Pioneers of the Iron and Steel Industry—Sir Henry Bessemer—Sir William Siemens—Werner von Siemens—The Krupps of Essen.

rancis Horner, writing early in this century, said that 'Iron is not only the soul of every other manufacture, but the mainspring perhaps of civilised society.' Cobden has said that 'our wealth, commerce, and manufactures grew out of the skilled labour of men working in metals.' According to Carlyle, the epic of the future is not to be Arms and the Man, but Tools and the Man. We all know that iron was mined and smelted in considerable quantities in this island as far back as the time of the Romans; and we cherish a vague notion that iron must have been mined and smelted here ever since on a progressively increasing scale. We are so accustomed to think and speak of ourselves as first among all nations, at the smelting-furnace, in the smithy, and amid the Titanic labours of the mechanical workshop, that we open large eyes when we are told what a recent conquest all this superiority is!There was, indeed, some centuries later than the Roman occupation, a period coming down to quite modern times, during which English iron-mines were left almost unworked. In Edward III.'s reign, the pots, spits, and frying-pans of the royal kitchen were classed among his majesty's jewels. For the planners of the Armada the greater abundance and excellence of Spanish iron compared with English was an important element in their calculations of success. In the fourteenth and fifteenth centuries, the home market looked to Spain and Germany for its supply both of iron and steel. After that, Sweden came prominently forward; and from her, as late as the middle of the eighteenth century, no less than four-fifths of the iron used in this country was imported!

The reason of this marvellous neglect of what has since proved one of our main sources of wealth lay in the enormous consumption of timber which the old smelting processes entailed. The charcoal used in producing a single ton of pig-iron represented four loads of wood, and that required for a ton of bar-iron represented seven loads. Of course, the neighbourhood of a forest was an essential condition to the establishment of ironworks; but wherever such an establishment was effected, the forest disappeared with portentous rapidity. At Lamberhurst, on the borders of Kent and Sussex, with so trifling a produce as five tons per week, the annual consumption of wood was two hundred thousand cords. The timber wealth of Kent, Surrey, and Sussex—which counties were then the centres of our iron industry—seemed menaced with speedy annihilation. In the destruction of these great forests, that of our maritime power was supposed to be intimately involved; so that it is easy to understand how, in those days, the development of the iron manufacture came to be regarded in the light of a national calamity, and a fitting subject for restrictive legislation! Various Acts were passed towards the end of the sixteenth century prohibiting smelting-furnaces within twenty-two miles of London, and many of the Sussex masters found themselves compelled, in consequence, to break up their works. During the civil wars of the seventeenth century, a severe blow was given to the trade by the destruction of all furnaces belonging to royalists; and after the Restoration we find the crown itself demolishing its own works in the Forest of Dean, on the old plea that the supply of shipbuilding timber was thereby imperilled. Between 1720 and 1730 the ironworks of Worcestershire and the Forest of Dean consumed 17,350 tons of timber annually, or five tons for each furnace.

'From this time' (the Restoration), says Mr Smiles, 'the iron manufacture of Sussex, as of England generally, rapidly declined. In 1740 there were only fifty-nine furnaces in all England, of which ten were in Sussex; and in 1788 there were only two. A few years later, and the Sussex iron-furnaces were blown out altogether. Farnhurst in Western, and Ashburnham in Eastern Sussex, witnessed the total extinction of the manufacture. The din of the iron hammer was hushed, the glare of the furnace faded, the last blast of the bellows was blown, and the district returned to its original rural solitude. Some of the furnace-ponds were drained and planted with hops or willows; others formed beautiful lakes in retired pleasure-grounds; while the remainder were used to drive flour-mills, as the streams in North Kent, instead of driving fulling-mills, were employed to work paper-mills.' The plentifulness of timber in the Scottish Highlands explains the establishment of smelting-furnaces, in 1753, by an English company at Bunawe in Argyllshire, whither the iron was brought from Furness in Lancashire.

Few of our readers can be unacquainted with the fact that iron-smelting at the present day is performed not with wood but with coal. It will readily, then, be understood that the substitution of the one description of fuel for the other must have formed the turning-point in the history of the British iron manufacture. This substitution, however, was brought about very slowly. The prejudice against coal was for a long period extreme; its use for domestic purposes was pronounced detrimental to health; and, even for purposes of manufacture, it was generally condemned. Nevertheless, as wood became scarcer and dearer, a closer examination into the capabilities of coal came naturally to be made; and here, as in almost every other industrial path, we find a foreigner acting as our pioneer. The Germans had long been experienced in mining and metallurgy; and it was a German, Simon Sturtevant, who first took out a patent for smelting iron with coal. But his process proved a failure, and the patent was cancelled. Other Germans, naturalised here, followed in Sturtevant's footsteps, but with no better results; until at last an Englishman, Dud Dudley (1599-1684), took up the idea, and gave it practical success. The town of Dudley was even then a centre of the iron manufacture, and Dud's noble father, Lord Dudley, owned several furnaces. But here, also, the forest-wealth of the district was fast melting away, and the trade already languished under the dread of impending dissolution. In the immediate neighbourhood, meanwhile, coal was abundant, with ironstone and limestone in close proximity to it. Dud, who, as a child, had haunted and scrutinised his father's ironworks with wondering delight, was placed just at this juncture in charge of a furnace and a couple of forges, and immediately turned his energetic mind to the question of smelting with coal. Some careful experiments succeeded so well that he wrote to his father, requesting him to take out a patent for the process; and this patent, registered in Lord Dudley's name, and dated the 22d February 1620, properly inaugurated the great metallurgic revolution which had made the English iron trade what it now is. Andrew Yarranton was another pioneer in the iron and tin-plate industry, and wrote a remarkable work on England's Improvement by Sea and Land (1677-81).

Nevertheless, even with this positive success on record, the inert insular mind long refused to follow the path cleared for it. Dud's discovery 'was neither appreciated by the iron-masters nor by the workmen;' and all schemes for smelting ore with any other fuel than wood-charcoal were regarded with incredulity. His secret seems to have been bequeathed to no one, and for many years after his death the old, much-abused, forest-devouring system went tottering on. Stern necessity, however, taught its hard lesson at last, and a period insensibly arrived when the employment of coal in smelting processes became the rule rather than the exception, and might be seen here and there on an unusually large scale—especially at the celebrated Coalbrookdale works, in the valley of the Severn, Shropshire.

The founder of the Coalbrookdale industries was a Quaker—Abraham Darby (1677-1717). A small furnace had existed on the spot ever since the days of the Tudors, and this small furnace formed the nucleus of that industrial activity which the visitor of Coalbrookdale surveys with such wonder at the present day.

In Darby's time, the principal cooking utensils of the poorer classes were pots and kettles made of cast-iron. But even this primitive ware was beyond native skill, and most of the utensils in question were imported from Holland. Exercising an effort of judgment, which, moderate as it was, seems to have been hitherto unexampled, Darby resolved to pay that country a visit, and ascertain in person why it was that Dutch castings were so good and English so bad. The use of dry sand instead of clay for the moulds comprised, he found, the whole secret.

On returning to England, Darby took out a patent for the new process, and his castings soon acquired repute. The use of pit-coal in the Coalbrookdale furnaces is not supposed, however, to have become general until the worthy Abraham had been succeeded by his son; but when it once did become so, the impetus thereby given to the iron trade and to coal-mining was immense. It is the latter industry which may pre-eminently claim to have called the steam-engine into existence. The demand for pumping-power adequate to the drainage of deep mines set Newcomen's brain to work; and the engine rough-sketched by his ingenuity, and perfected by the genius of Watt, soon increased enormously the production of iron by rendering coal more accessible and the blast-furnace more efficient.

A son-in-law of Abraham Darby's, Richard Reynolds by name, made a great stride towards the modern railway by substituting iron for wood on the tramways which connected the different works at Coalbrookdale; and it was a grandson of the same Abraham who designed and erected the first iron bridge.

England, we have seen, borrowed the idea of her smelting processes and iron-castings from Germany and Holland; but the discovery of that important material, cast-steel, belongs, at least, to one of her own sons. Yet even here the relationship is a merely conventional one, for Benjamin Huntsman (1704-1776) was the child of German parents who had settled in Lincolnshire.

Huntsman's original calling was that of a clock-maker; but his remarkable mechanical skill, his shrewdness, and his practical sense, soon gave him the repute of the 'wise man' of the district, and brought neighbours to consult him not only as to the repair of every ordinary sort of machinery, but also of the human frame—the most complex of all machines! It was his daily experience of the inferior quality of the tools at his command that led him to make experiments in the manufacture of steel. What his experiments were we have no record to show; but that they must have been conducted with Teutonic patience and thoroughness there can be no doubt, from the formidable nature of the difficulties overcome.

England, however, long refused to make use of Huntsman's precious material, although produced in her very midst. The Sheffield cutlers would have nothing to do with a substance so much harder than anything they were accustomed to, and Huntsman was actually compelled to look for his market abroad! All the cast-steel he could manufacture was sent over to France, and the merit of employing this material for general purposes belongs originally to that country. The inventions of Henry Cort (1740-1800) for refining and rolling iron (1785) were the mainspring of the malleable iron trade, and made Great Britain independent of Russia and Sweden for supplies of manufactured iron. One authority has stated that since 1790, when Cort's improvements were entirely established, the value of landed property in England had doubled. But he was unfortunate in business life, and in 1811 upwards of forty iron firms subscribed towards a fund for the assistance of his widow and nine orphan children. David Mushet (1772-1847) did much for the expansion of the iron trade in Scotland by his preparation of steel from bar-iron by a direct process, combining the iron with carbon, and by his discovery of the effect of manganese on steel.

Steel is the material of which the instruments of labour are essentially made. Upon the quality of the material, that of the instrument naturally depends, and upon the quality of the instrument, that, in great measure, of the work. Watt's marvellous invention ran great risk, at one time, of being abandoned, for the simple reason that the mechanical capacities of the age were not 'up' to its embodiment. Even after Watt had secured the aid of Boulton's best workmen, Smeaton gave it as his opinion that the steam-engine could never be brought into general use, because of the difficulty of getting its various parts made with the requisite precision.

The execution by machinery of work ordinarily executed by hand-tools has been a gigantic stride in the path of material civilisation. The earliest phase of the great modern movement in this direction is represented, probably, by the sawmill. A sawmill was erected near London as long ago as 1663—by a foreigner—but was shortly abandoned in consequence of the determined hostility of the sawyers; and more than a century elapsed before another mill was put up. But the sawmill is comparatively a rude structure, and the material it operates upon is easily treated, even by the hand. When we come to deal, however, with such substances as iron and steel, the benefit of machinery becomes incalculable. Without our recent machine-tools, indeed, the stupendous iron creations of the present day would have been impossible at any cost; for no amount of hand-labour could ever attain that perfect exactitude of construction without which it would be idle to attempt fitting the component parts of these colossal structures together.

The first impulse, however, to the improvement of machine-tools for ironwork was given by a difficulty born not of mass but of minuteness.

Up to the end of the last century, the locks in common use among us were of the rudest description, and afforded scarcely any security against thieves. To meet this universal want, Joseph Bramah set his remarkable inventive faculties to work, and speedily contrived a lock so perfect, that it held its ground for many a day. But Bramah's locks are machines of the most delicate kind, depending for their efficiency upon the precision with which their component parts are finished; and, at that time, the attainment of this precision, at such a price as to render the lock an article of extensive commerce, seemed an insuperable difficulty. In his dilemma, Bramah's attention was directed to a youngster in the Woolwich Arsenal smithy, named Henry Maudsley, whose reputation for ingenuity was already great among his fellows. Bramah was at first almost ashamed to take such a mere lad into his counsels; but a preliminary conversation convinced him that his confidence would not be misplaced. He persuaded Maudsley to enter his employment, and the result was the invention, between them, of the planing-machine, applicable either to wood or metal, as also of certain improvements in the old lathe, more particularly of that known as the 'slide-rest.'

In the old-fashioned lathe, the workman guided his cutting-tool by sheer muscular strength, and the slightest variation in the pressure necessarily led to an irregularity of surface. The rest for the hand is in this case fixed, and the tool held by the workman travels along it. Now, the principle of the slide-rest is the opposite of this. The rest itself holds the tool firmly fixed in it, and slides along the bench in a direction parallel with the axis of the work. All that the workman has to do, therefore, is to turn a screw-handle, by means of which the cutter is carried along with the smallest possible expenditure of strength; and even this trifling labour has been since got rid of, by making the rest self-acting.

Simple and obvious as this improvement seems, its importance cannot be overrated. The accuracy it insured was precisely the desideratum of the day! By means of the slide-rest, the most delicate as well as the most ponderous pieces of machinery can be turned with mathematical precision; and from this invention must date that extraordinary development of mechanical power and production which is a characteristic of the age we live in. 'Without the aid of the vast accession to our power of producing perfect mechanism which it at once supplied,' says a first-class judge in matters of the kind, 'we could never have worked out into practical and profitable forms the conceptions of those master-minds who, during the past half-century, have so successfully pioneered the way for mankind. The steam-engine itself, which supplies us with such unbounded power, owes its present perfection to this most admirable means of giving to metallic objects the most precise and perfect geometrical forms. How could we, for instance, have good steam-engines if we had not the means of boring out a true cylinder, or turning a true piston-rod, or planing a valve-face?'

It would perhaps be impossible to cite any more authoritative estimate of Maudsley's invention than the above. The words placed between inverted commas are the words of James Nasmyth, the inventor of that wonderful steam-hammer which Professor Tomlinson characterises as 'one of the most perfect of artificial machines and noblest triumphs of mind over matter that modern English engineers have yet developed.'

This machine enlarged at one bound the whole scale of working in iron, and permitted Maudsley's lathe to develop its entire range of capacity. The old 'tilt-hammer' was so constructed that the more voluminous the material submitted to it, the less was the power attainable; so that as soon as certain dimensions had been exceeded, the hammer became utterly useless. When the Great Western steamship was in course of construction, tenders were invited from the leading mechanical firms for the supply of the enormous paddle-shaft required for her engines. But a forging of the size in question had never been executed, and no firm in England would undertake the contract. In this dilemma, Mr Nasmyth was applied to, and the result of his study of the problem was this marvellous steam-hammer—so powerful that it will forge an Armstrong hundred-pounder as easily as a farrier forges a horse-shoe, and so delicately manageable that it will crack a nut without bruising its kernel!

BESSEMER STEEL.

In 1722, RÉaumur produced steel by melting three parts of cast-iron with one part of wrought iron (probably in a crucible) in a common forge; he, however, failed to produce steel in this manner on a working scale. This process has many points in common with the Indian Wootz-steel manufacture.

As we have seen, to Benjamin Huntsman, a Doncaster artisan, belongs the credit of first producing cast-steel upon a working scale, as he was the first to accomplish the entire fusion of converted bar-iron (that is, blister-steel) of the required degree of hardness, in crucibles or clay pots, placed among the coke of an air-furnace. This process is still carried on at Sheffield and elsewhere, and is what is generally known as the crucible or pot-steel process. It was mainly supplementary to the cementation process, as formerly blister-steel was alone melted in the crucibles; but latterly, and at the present time, the crucible mode of manufacture embraces the fusion of other varieties and combinations of metal, producing accordingly different classes and qualities of steel.

In 1839, Josiah Marshall Heath patented the important application of carburet of manganese to steel in the crucible, which application imparted to the resulting product the properties of varying temper and increased forgeability. He subsequently found out that a separate operation was not necessary to form the carburet—which is produced by heating peroxide of manganese and carbon to a high temperature—but that the same result could be attained by simply in the first instance adding the carbon and oxide of manganese direct to the metal in the crucible. He unsuspectingly communicated this after-discovery to his agent—by name Unwin—who took advantage of the fact that it was not incorporated in the wording of the patent, and so was unprotected, to make use of it for his own advantage. The result was one of the most remarkable patent trials on record, extending over twelve years, and terminating in 1855 against the patentee—a remarkable instance of the triumph of legal technicalities over the moral sense of right.

A very important development of the manufacture of steel followed the introduction of the 'Bessemer process,' by means of which a low carbon or mild cast-steel can be produced at about one-tenth of the cost of crucible steel. It is used for rails, for the tires of the wheels of railway carriages, for ship-plates, boiler-plates, for shafting, and a multitude of constructional and other purposes to which only wrought iron was formerly applied, besides many for which no metal at all was used.

Sir Henry Bessemer's process for making steel, which is now so largely practised in England, on the continent of Europe, and in America, was patented in 1856. It was first applied to the making of malleable iron, but this has never been successfully made by the Bessemer method. For the manufacture of a cheap but highly serviceable steel, however, its success has been so splendid that no other metallurgical process has given its inventor so great a renown. Although the apparatus actually used is somewhat costly and elaborate, yet the principle of the operation is very simple. A large converting vessel, with openings called tuyÈres in its bottom, is partially filled up with from 5 to 10 tons of molten pig-iron, and a blast of air, at a pressure of from 18 to 20 lb. per square inch, is forced through this metal by a blowing engine. Pig-iron contains from 3 to 5 per cent. of carbon, and, if it has been smelted with charcoal from a pure ore, as is the case with Swedish iron, the blast is continued till only from .25 to 1 per cent. of the carbon is left in the metal, that is to say, steel is produced. Sometimes, however, the minimum quantity of carbon is even less than .25 per cent. In England, where a less pure but still expensive cast-iron—viz. hÆmatite pig—is used for the production of steel in the ordinary Bessemer converter, the process differs slightly. In this case the whole of the carbon is oxidised by the blast of air, and the requisite quantity of this element is afterwards restored to the metal by pouring into the converter a small quantity of a peculiar kind of cast-iron, called spiegeleisen, which contains a known quantity of carbon. But small quantities of manganese and silicon are also present in Bessemer steel. The 'blow' lasts from 20 to 30 minutes. Steel made from whatever kind of pig-iron, either by this or by the 'basic' process, is not sufficiently dense, at least for most purposes, and it is accordingly manipulated under the steam-hammer and rolled into a variety of forms. Bessemer steel is employed, as we have said, for heavy objects, as rails, tires, rollers, boiler-plates, ship-plates, and for many other purposes for which malleable iron was formerly used.

Basic steel is now largely made from inferior pig-iron, such as the Cleveland, by the Thomas-Gilchrist process patented in 1878. It is, however, only a modification of the Bessemer process to the extent of substituting for the siliceous or 'acid' lining generally used, a lime or 'basic' lining for the converter. Limestone, preferably a magnesian limestone in some form, is commonly employed for the lining. By the use of a basic lining, phosphorus is eliminated towards the end of the 'blow.' Phosphorus is a very deleterious substance in steel, and is present, sometimes to the extent of 2 per cent., in pig-iron smelted from impure ore.

The four inventions of this century which have given the greatest impetus to the manufacture of iron and steel were—the introduction of the hot blast into the blast-furnace for the production of crude iron, made by J. B. Neilson, of the Glasgow Gas-works, in 1827; the application of the cold blast in the Bessemer converter which we have just described; the production of steel direct from the ore, by Siemens, in the open hearth; and the discovery of a basic lining by which phosphorus is eliminated and all kinds of iron converted into steel. This last was the discovery of G. J. Snelus, of London, and it was made a practical success by the Thomas & Gilchrist process just described. In 1883, Mr Snelus was awarded the Bessemer gold medal of the Iron and Steel Institute 'as the first man who made pure steel from impure iron in a Bessemer converter lined with basic materials.'

SIR HENRY BESSEMER.

Sir Henry Bessemer, the inventor of the modern process of making steel from iron, which has just been described, was the son of Anthony Bessemer, who escaped from France in 1792, and found employment in the English Mint. He was born in 1813, at Charlton, Herts, where his father had an estate, was to a great extent self-taught, and his favourite amusement was in modelling buildings and other objects in clay. He came up to London 'knowing no one, and no one knowing me—a mere cipher in this vast sea of enterprise.' He first earned his living by engraving a large number of elegant and original designs on steel with a diamond point, for patent medicine labels. He found work also as designer and modeller. He has been a prolific inventor, as the volumes issued by the Patent Office show. It has been said that he has paid in patent stamp duties alone as much as £10,000. At twenty he invented a mode of taking copies from antique and modern basso-relievos in such a way that they might be stamped on card-board, thousands being produced at a small cost.

His inventive faculty also devised a ready method whereby those who were defrauding the government by detaching old stamps from leases, money-bills, and agreements, and by using them over again, could be defeated in their purpose.

His first pecuniary success was obtained by his invention of machinery for the manufacture of Bessemer gold and bronze powders, which was not patented, but the nature of which was long kept secret. Another successful invention was a machine for making Utrecht velvet. He also interested himself in the manufacture of paints, oils, and varnishes, sugar, railway carriages, ordnance, projectiles, and the ventilation of mines. In the Exhibition of 1851 he exhibited an ingenious machine for grinding and polishing plate-glass.

Like Lord Armstrong, Bessemer turned his attention to the subject of the improvement of projectiles when there was a prospect of a European war in 1853. He invented a mode of firing elongated projectiles from smooth-bore guns, but received no countenance from the officials at Woolwich.

Commander MiniÉ, who had charge of the experiments which Bessemer was making on behalf of the Emperor of the French, said: 'Yes, the shots rotate properly; but if we cannot get something stronger for our guns, these heavy projectiles will be of little use.' This started Bessemer thinking and experimenting further, and led up, as we will see, to the great industrial revolution with which his name stands identified. He informed the Emperor that he intended to study the whole subject of metals suitable for artillery purposes. He built experimental works at St Pancras, but made many failures, furnace after furnace being pulled down and rebuilt. His prolonged and expensive experiments in getting a suitable ordnance metal were meanwhile using up his capital; but he was on the eve of a great discovery, and began to see that the refinement of iron might go on until pure malleable iron or steel could be obtained. His wife aided and encouraged him at this time as only a true wife can. After a year and a half, in which he patented many improvements in the existing systems of manufacture, it occurred to him to introduce a blast of atmospheric air into the fluid metal, whereby the cast-iron might be made malleable. He found that by blowing air through crude iron in a fluid state, it could thus be rendered malleable. He next tried the method of having the air blown from below by means of an air-engine. Molten iron being poured into the vessel, and air being forced in from below, resulted in a surprising combustion, and the iron in the vessel was transformed into steel. The introduction of oxygen through the fluid iron, induced a higher heat, and burned up the impurities. Feeling that he had succeeded in his experiment, he acquainted Mr George Rennie with the result. The latter said to him: 'This must not be hid under a bushel. The British Association meets next week at Cheltenham; if you have patented your invention, draw up an account of it in a paper, and have it read in Section G.' Accordingly Bessemer wrote an account of his process, and in August 1856, he read his paper before the British Association 'On the Manufacture of Malleable Iron and Steel without Fuel,' which startled the iron trade of the country.

On the morning of the day on which his paper was to be read, Bessemer was sitting at breakfast in his hotel, when an iron-master to whom he was unknown, laughingly said to a friend: 'Do you know that there is somebody come down from London to read us a paper on making steel from cast-iron without fuel? Did you ever hear of such nonsense?'

Amongst those who spoke generously and enthusiastically of Bessemer's new process was James Nasmyth, to whom the inventor offered one-third share of the value of the patent, which would have been another fortune to him. Nasmyth had made money enough by this time, however, and declined.

In a communication to Nasmyth, Sir Henry Bessemer thanked him for his early patronage, and described his discovery: 'I shall ever feel grateful for the noble way in which you spoke at the meeting at Cheltenham of my invention. If I remember rightly, you held up a piece of malleable iron, saying words to this effect: "Here is a true British nugget! Here is a new process that promises to put an end to all puddling; and I may mention that at this moment there are puddling-furnaces in successful operation where my patent hollow steam-rabbler is at work, producing iron of superior quality by the introduction of jets of steam in the puddling process. I do not, however, lay any claim to this invention of Mr Bessemer; but I may fairly be entitled to say that I have advanced along the roads on which he has travelled so many miles, and has effected such unexpected results, that I do not hesitate to say that I may go home from this meeting and tear up my patent, for my process of puddling is assuredly superseded."'

After giving an account of his failures, as well as successes, Sir Henry proceeded to say: 'I prepared to try another experiment, in a crucible having no hole in the bottom, but which was provided with an iron pipe put through a hole in the cover, and passing down nearly to the bottom of the crucible. The small lumps and grains of iron were packed round it, so as nearly to fill the crucible. A blast of air was to be forced down the pipe so as to rise up among the pieces of granular iron, and partly decarburise them. The pipe could then be withdrawn, and the fire urged until the metal with its coat of oxide was fused, and cast-steel thereby produced.

'While the blowing apparatus for this experiment was being fitted up, I was taken with one of those short but painful illnesses to which I was subject at that time. I was confined to my bed, and it was then that my mind, dwelling for hours together on the experiment about to be made, suggested that instead of trying to decarburise the granulated metal by forcing the air down the vertical pipe among the pieces of iron, the air would act much more energetically and more rapidly if I first melted the iron in the crucible, and forced the air down the pipe below the surface of the fluid metal, and thus burnt out the carbon and silicum which it contained.

'This appeared so feasible, and in every way so great an improvement, that the experiment on the granular pieces was at once abandoned, and as soon as I was well enough, I proceeded to try the experiment of forcing the air under the fluid metal. The result was marvellous. Complete decarburation was effected in half an hour. The heat produced was immense, but unfortunately more than half the metal was blown out of the pot. This led to the use of pots with large, hollow, perforated covers, which effectually prevented the loss of metal. These experiments continued from January to October 1855. I have by me on the mantelpiece at this moment, a small piece of rolled bar-iron which was rolled at Woolwich Arsenal, and exhibited a year later at Cheltenham.

'I then applied for a patent, but before preparing my provisional specification (dated October 17, 1855), I searched for other patents to ascertain whether anything of the sort had been done before. I then found your patent for puddling with the steam-rabble, and also Martin's patent for the use of steam in gutters while molten iron was being conveyed from the blast-furnace to a finery, there to be refined in the ordinary way prior to puddling.'

Several leading men in the iron trade took licenses for the new manufacture, which brought Bessemer £27,000 within thirty days of the time of reading his paper. These licenses he afterwards bought back for £31,000, giving fresh ones in their stead. Some of the early experiments failed, and it was feared the new method would prove impracticable. These experiments failed because of the presence of phosphorus in the iron. But Bessemer worked steadily in order to remove the difficulties which had arisen, and a chemical laboratory was added to his establishment, with a professor of chemistry attached. Success awaited him. The new method of steel-making spread into France and Sweden, and in 1879 the works for making Bessemer steel were eighty-four in number, and represented a capital of more than three millions. His process for the manufacture of steel raised the annual production of steel in England from 50,000 tons by the older processes to as many as 2,000,000 tons in some years. It was next used for boiler-plates; shipbuilding with Bessemer steel was begun in 1862, and now it is employed for most of the purposes for which malleable iron was formerly used. The production of Europe and America in 1892 was over 10,000,000 tons, of a probable value of £84,000,000, sufficient, as has been remarked, to make a solid steel wall round London 40 feet high, and 5 feet thick. It would take, according to the inventor, two or three years' production of all the gold-mines in the world to pay in gold for the output of Bessemer steel for one year. The price of steel previous to Huntsman's process was about £10,000 per ton; after him, from £50 to £100. Now Bessemer leaves it at £5 to £6 per ton. And a process which occupied ten days can be accomplished within half an hour.

In his sketch of the 'Bessemer Steel Industry, Past and Present' (1894), Sir Henry Bessemer says: 'It is this new material, so much stronger and tougher than common iron, that now builds our ships of war and our mercantile marine. Steel forms their boilers, their propeller shafts, their hulls, their masts and spars, their standing rigging, their cable chains and anchors, and also their guns and armour-plating. This new material has covered with a network of steel rails the surface of every country in Europe, and in America alone there are no less than 175,000 miles of Bessemer steel rails.' These steel rails last six times longer than if laid of iron.

Bessemer was knighted in 1879, and has received many gold medals from scientific institutions. In addition he has, to use his own words, received in the form of royalties 1,057,748 of the beautiful little gold medals (sovereigns) issued by her Majesty's Mint. The method chosen by the Americans to perpetuate his name has been the founding of the growing centre of industry called Bessemer in Indiana, while Bessemer, in Pennsylvania, is the seat of the great Edgar Thompson steel-works. Thus the man who was at first neglected by government has become wealthy beyond the dreams of avarice, and his name is immortal in the annals of our manufacturing industry.

SIR CHARLES WILLIAM SIEMENS AND THE SIEMENS PROCESS.

Another pioneer in the manufacture of steel and iron was Charles William Siemens, the seventh child of a German landowner, who was born at Lenthe, near Hanover, 4th April 1823. He showed an affectionate and sensitive disposition while very young, and a strong faculty of observation. He received a good plain education at LÜbeck, and in deference to his brother Werner he agreed to become an engineer, and accordingly was sent to an industrial school at Magdeburg in 1838, where he also learned languages, including English; mathematics he learned from his interested brother. He left Magdeburg in 1841 in order to increase his scientific knowledge at GÖttingen, and there he studied chemistry and physics, with the view of becoming an engineer. Werner, his elder brother, was still his good genius, and after the death of their parents counselled and encouraged him, and looked upon him as a probable future colleague. They corresponded with one another, not only about family affairs, but also about the scientific and technical subjects in which both were engrossed. This became a life-long habit with the brothers Siemens. One early letter from William described a new kind of valve-gearing which he had invented for Cornish steam-engines. Then the germ of the idea of what was afterwards known as the 'chronometric governor' for steam-engines was likewise communicated in this way. Mr Pole says that his early letters were significant of the talent and capacity of the writer. 'They evince an acuteness of perception in mechanical matters, a power of close and correct reasoning, a sound judgment, a fertility of invention, and an ease and accuracy of expression which, in a youth of nineteen, who had only a few months' experience in a workshop, are extraordinary, and undoubtedly shadow forth the brilliant future he attained in the engineering world.'

Werner in 1841 had taken out a patent for his method of electro-gilding, while William early in 1843 paid his first visit to England, travelling by way of Hamburg. He took up his abode in a little inn called the 'Ship and Star,' at Sparrow Corner, near the Minories. In an address as President of the Midland Institute, Birmingham, on 28th October 1881, he related his first experiences in England, and how he secured his first success there.

Mr Siemens said: 'That form of energy known as the electric current was nothing more than the philosopher's delight forty years ago; its first application may be traced to this good town of Birmingham, where Mr George Richards Elkington, utilising the discoveries of Davy, Faraday, and Jacobi, had established a practical process of electroplating in 1842.... Although I was only a young student of GÖttingen, under twenty years of age, who had just entered upon his practical career with a mechanical engineer, I joined my brother Werner Siemens, then a young lieutenant of artillery in the Prussian service, in his endeavour to accomplish electro-gilding.... I tore myself away from the narrow circumstances surrounding me, and landed at the East End of London, with only a few pounds in my pocket and without friends, but an ardent confidence of ultimate success within my breast.

'I expected to find some office in which inventions were examined into, and rewarded if found meritorious, but no one could direct me to such a place. In walking along Finsbury Pavement I saw written up in large letters, "So-and-So"—I forget the name—"undertaker," and the thought struck me that this must be the place I was in quest of; at any rate, I thought that a person advertising himself as an "undertaker" would not refuse to look into my invention, with the view of obtaining for me the sought for recognition or reward. On entering the place I soon convinced myself, however, that I came decidedly too soon for the kind of enterprise there contemplated.' By dint of perseverance, however, Siemens secured a letter from Messrs Poole and Carpmaell, of the Patent Office, to Mr Elkington of Birmingham. Elkington and his partner Josiah Mason both met the young inventor in such a spirit of fairness that, as he says, he returned to his native country, and to his mechanical engineering, 'a comparative Croesus.' After the lapse of forty years his heart still beat quick when thinking of this determining incident in his career.

The sum which Elkington paid him for his 'thermo-electrical battery' for depositing solutions of gold, silver, and copper was £1600, less £110 for the cost of the patent. Although quite successful at the time, other and cheaper processes speedily supplanted it; but the young German had gained a footing and the money he needed for future experiments. When he came back to Germany he was looked upon as quite a hero by his admiring family circle. It was indeed a creditable exploit for a youth of twenty. When he returned to England again in February 1844, he received so much encouragement from leading engineers and scientific men for his 'chronometric governor,' that he decided to settle permanently there, and he became a naturalised British subject in 1859. He joined with a civil engineer, named Joseph Woods, for the promotion and sale of his patents. 'Anastatic printing' was one of his early inventions, which, however, never became profitable. Then came schemes in paper-making, new methods of propelling ships, winged rockets, and locomotives on new principles, all of which were a continual drain on his own and his friends' resources without a corresponding return, so that in 1845 he took a situation and earned some money by railway work, which enabled him to pay another visit to Germany. In 1846, undaunted by previous failures, he threw himself heartily into the study of the action of heat as a power-giving agent, and invented an arrangement known as the 'regenerator' for saving certain portions of this waste. As afterwards applied to furnaces for iron, steel, zinc, glass, and other works, it was pronounced by Sir Henry Bessemer a beautiful invention, at once the most philosophic in principle, the most powerful in action, and the most economic of all the contrivances for producing heat by the combustion of coal. He now secured an appointment in 1849 with Fox & Henderson, Birmingham, at a fixed salary of £400 a year, and his interest in his patent. Here he profited largely by the experience gained, but the engagement terminated in 1851, when he afterwards settled as a civil engineer in 7 John Street, Adelphi, in March 1852.

His next great achievement was the production of steel direct from the raw ores by means of his regenerative furnace, which the President of the Board of Trade in 1883 mentioned in the House of Commons as one of the most valuable inventions ever produced under the protection of the English patent law, and he said further that it was then being used in almost every industry in the kingdom. Siemens had spent fourteen years in perfecting this regenerative furnace, and it took him other fourteen to utilise it, and perfect it in making steel direct from the raw ores. Martin of Sireil, who made one or two additions to the Siemens steel furnace, has been termed its inventor, but this claim has no foundation. What is known, however, as the 'Siemens-Martin process' is now competing very effectively with the Bessemer process. It consists essentially in first obtaining a bath of melted pig-iron of high quality, and then adding to this pieces of wrought-iron scrap or Bessemer scrap, such as crop ends of rails, shearings of plates, &c. These, though practically non-infusible in large quantities by themselves, become dissolved or fused in such a bath if added gradually. To the bath of molten metal thus obtained spiegeleisen or ferro-manganese is added to supply the required carbon and to otherwise act as in the Bessemer converter. The result is tested by small ladle samples, and when it is of the desired quality a portion is run off, leaving sufficient bath for the continuation of the process.

Siemens took out his patent for the 'open hearth' process of steel-making (the Forth Bridge is built of steel made in this way) in 1861, and four years later erected sample steel works at Birmingham. The engineer of the London and North-Western Railway adopted his system at Crewe in 1868, and the Great Western Railway works followed. In 1869 this process was being carried out on a large scale at the works of the Landore-Siemens Steel Company and elsewhere in England, as well as at various works on the Continent, including Krupp's, at Essen.

In 1862, Siemens was elected a Fellow of the Royal Society, and in 1874 was presented with the Royal Albert Medal, and in 1875 with the Bessemer Medal in recognition of his researches and inventions in heat and metallurgy. He filled the president's chair in the three principal engineering and telegraphic societies of Great Britain, and in 1882 was President of the British Association. As manager in England of the firm of Siemens Brothers, Sir William Siemens was actively engaged in the construction of overland and submarine telegraphs. The steamship Faraday was specially designed by him for cable-laying. In addition to his labours in connection with electric-lighting, Sir William Siemens also successfully applied, in the construction of the Portrush Electric Tramway, which was opened in 1883, electricity to the production of locomotion. In his regenerative furnace, as we have seen, he utilised in an ingenious way the heat which would otherwise have escaped with the products of combustion. The process was subsequently applied in many industrial processes, but notably by Siemens himself in the manufacture of steel.

The other inventions and researches of this wonderful man include a water-meter; a thermometer or pyrometer, which measures by the change produced in the electric conductivity of metals; the bathometer, for measuring ocean depths by variations in the attraction exerted on a delicately suspended body; and the hastening of vegetable growth by use of the electric light. He was knighted in April 1883, and died on November 19 of the same year. There is a memorial window to his memory in Westminster Abbey.

As the elder brother of Sir William Siemens was so closely connected with him in business life, and may be said to have encouraged and led him into the walk of life in which he excelled, he also deserves a notice here. Werner Von Siemens, engineer and electrician, was born December 13, 1816, at Lenthe in Hanover. In 1834 he entered the Prussian Artillery; and in 1844 was put in charge of the artillery workshops at Berlin. He early showed scientific tastes, and in 1841 took out his first patent for galvanic silver and gold plating. By selling the right of using his process he made 40 louis d'or, which supplied him with the means for further experiments. During the Schleswig-Holstein war, he attracted considerable attention by using electricity for the firing of the mines which had been laid for the defence of Kiel harbour. He was of peculiar service in developing the telegraphic service in Prussia, and discovered in this connection the valuable insulating property of gutta-percha for underground and submarine cables. In 1849 he left the army, and shortly after the service of the state altogether, and devoted his energies to the construction of telegraphic and electrical apparatus of all kinds. The well-known firm of Siemens and Halske was established in 1847 in Berlin, and to them the Russian government entrusted the construction of the telegraph lines in that country. Subsequently branches were formed, chiefly under the management of the younger brothers of Werner Siemens, in St Petersburg (1857), in London (1858), in Vienna (1858), and in Tiflis (1863). In 1857, Siemens accomplished the remarkable feat of successfully laying a cable in deep water, at a depth of more than 1000 fathoms. This was between Sardinia and Bona. Shortly after he superintended the laying of cables in the Red Sea; and these successful experiments soon led to the greatest undertaking of all, the connection of America with Europe. Besides devising numerous useful forms of galvanometers and other electrical instruments of precision, Werner Siemens was one of the discoverers of the principle of the self-acting dynamo. He also made valuable determinations of the electrical resistance of different substances, the resistance of a column of mercury, one metre long, and one square millimetre cross section at 0°C., being known as the Siemens Unit. His numerous scientific and technical papers, written for the various journals, were republished in collected form in 1881. In 1886 he gave 500,000 marks for the founding of an imperial institute of technology and physics; and in 1888 he was ennobled. He died at Berlin, 6th December 1892. A translation of his Personal Recollections by Coupland appeared in 1893.

Space forbids us mentioning other worthy names in the steel and iron trade, although we cannot pass by Sir John Brown, founder of the Atlas Steel-works, Sheffield (1857), and one of the first to adopt the Bessemer process. He was also the pioneer of armour-plate making. The immense strides he made in business may be judged from the fact that when he started in 1857 his employees numbered 200, with a turnover of £3000 a year; in 1867 they numbered 4000, and the turnover was £1,000,000. The weekly pay roll amounted to £7000 in 1883, and when he handed over the business to his successors, he was paid £200,000 for the goodwill.

KRUPP'S IRON AND STEEL WORKS AT ESSEN.

One of the largest iron and steel manufacturing establishments in the world is that founded by the late Alfred Krupp, the famous German cannon-founder, whose name is so well known in connection with modern improvements in artillery. His principal works are situated at Essen, in Prussia, in the midst of a district productive of both iron and coal. The town of Essen, which at the beginning of the present century contained less than four thousand inhabitants, has become an important industrial centre, with a population of nearly eighty thousand persons, this increase being chiefly due to the growth of the ironworks, and the consequent demand for labour. In the vicinity of the town, numerous coal and iron mines, many of which are owned by the Krupp firm, are in active working, and furnish employment to the large population of the surrounding district. Much of the output of iron ore and coal from these mines is destined for consumption in the vast Krupp works within the town. Those works had their origin in a small iron forge established at Essen in the year 1810 by Frederick Krupp, the father of Alfred Krupp. The elder Krupp was not prosperous; and a lawsuit in which he became involved, and which lasted for ten years, though finally decided in his favour, reduced him nearly to bankruptcy. He died in 1826, in impoverished circumstances, leaving a widow and three sons, the eldest of whom was Alfred, aged fourteen. The business was continued by the widow, who managed, though with difficulty, to procure a good education for her sons. When the eldest, Alfred, took control of the works in 1848, he found there, as he himself has described, 'three workmen, and more debts than fortune.'

Krupp's subsequent career affords a remarkable instance of success attained, despite adverse circumstances, by sheer force of ability and energy, in building up a colossal manufacturing business from a humble beginning. On his death in 1887 his only son succeeded him. At the present time, Krupp's works within the town of Essen occupy more than five hundred acres, half of which area is under cover. In 1895, the number of persons in his employ was 25,300, and including members of their families, over 50,000. Of the army of workers, about 17,000 were employed at the works in Essen, the remainder being occupied in the 550 iron and coal mines belonging to the firm, or at the branch works at Sayn Neuwied, Magdeburg, Duisburg, and Engers; or in the iron-mines at Bilbao, in Spain, which produce the best ores. In Krupp's Essen works there are one hundred and twelve steam-hammers, ranging in weight from fifty tons down to four hundred pounds. There are 15 Bessemer converters, 18 Martin-furnaces, 420 steam-engines—representing together 33,150 horse-power—and twenty-one rolling trains; the daily consumption of coal and coke being 3100 tons by 1648 furnaces. The average daily consumption of water, which is brought from the river Ruhr by an aqueduct, is 24,700 cubic metres. The electric light has been introduced, and the work ceases entirely only on Sunday and two or three holidays. Connected with the Essen works are fifty miles of railway, employing thirty-five locomotives and over 1000 wagons. There are two chemical laboratories; a photographic and lithographic studio; a printing-office, with steam and hand presses; and a bookbinding room, besides tile-works, coke-works, gas-works, &c.

Though, in the popular mind, the name of Krupp is usually associated with the manufacture of instruments of destruction, yet two-thirds of the work done in his establishment is devoted to the production of articles intended for peaceful uses. The various parts of steam-engines, both stationary and locomotive; iron axles, bridges, rails, wheel-tires, switches, springs, shafts for steamers, mint-dies, rudders, and parts of all varieties of iron machinery, are prepared here for manufacturers. The production is, in Dominie Sampson's phrase, 'prodigious.' In one day the works can turn out 2700 rails, 350 wheel-tires, 150 axles, 180 railway wheels, 1000 railway wedges, 1500 bombshells. In a month they have produced 250 field-pieces, thirty 5.7-inch cannon, fifteen 9.33-inch cannon, eight 11-inch cannon, one 14-inch gun, the weight of the last named being over fifty tons, and its length twenty-eight feet seven inches. Till the end of 1894 the firm has produced 25,000 cannon for thirty-four different states.

Alfred Krupp devoted much attention to the production of steel of the finest quality, and was the first German manufacturer who succeeded in casting steel in large masses. In 1862 he exhibited in London an ingot of finest crucible steel weighing twenty-one tons. Its dimensions were nine feet high by forty-four inches diameter. The uniformity of quality of this mass of metal was proven by the fact that when broken across it showed no seam or flaw, even when examined with a lens. The firm can now make such homogeneous blocks of seventy-five tons weight if required. Such ingots are formed from the contents of a great number of small crucibles, each containing from fifty to one hundred pounds of the metal. The recent developments of the manufacture of steel by the open-hearth process have removed all difficulty in procuring the metal in masses large enough for all requirements, and of a tensile strength so high as thirty-three to thirty-seven tons to the square inch. Crucible steel, however, though more expensive, still holds its place as the best and most reliable that can be produced; and nothing else is ever used in the construction of a Krupp gun. By the perfected methods in use at the Essen works, such steel can be made of a tensile strength of nearly forty tons to the square inch, and of marvellous uniformity of quality. The ores used in the Krupp works for making the best steel are red hÆmatite and spathic ore, with a certain proportion of ferro-manganese. The crucibles employed are formed of a mixture of plumbago and fire-clay, shaped by a mould into a cylindrical jar some eighteen inches in height, and baked in a kiln. When in use, they are filled with small bars of puddled metal, mixed with fragments of marble brought from Villmar, on the Lahn. They are then shovelled into large furnaces, whose floors are elevated three or four feet above the ground-level. In the earthen floor of the immense room containing the furnaces are two lines of pits, one set to receive the molten metal, the other intended for the red-hot crucibles when emptied of their contents. When the crucibles have undergone sufficient heating, the furnace doors are opened simultaneously at a given signal, and the attendant workmen draw out the crucibles with long tongs, and rapidly empty them into the pits prepared for the reception of the metal. The empty crucibles when cooled are examined, and if found unbroken, are used again; but if damaged, as is usually the case, are ground up, to be utilised in making new ones.

The production of steel by this method furnishes employment for eight or nine hundred men daily in the Krupp works. The Bessemer process for converting iron into steel is also largely used there for making steel for certain purposes. All material used in the different classes of manufactures is subjected at every stage to extreme and exact tests; the standards being fixed with reference to the purpose to which the metal is to be applied, and any material that proves faulty when suitably tested is rigorously rejected.

The guns originally manufactured by the Krupp firm were formed from solid ingots of steel, which were bored, turned, and fashioned as in the case of cast-iron smooth-bore cannon. With the development of the power of artillery, the greater strain caused by the increased powder-charges and by the adoption of rifling—involving enhanced friction between the projectile and the bore—had the result of demonstrating the weakness inherent in the construction of a gun thus made entirely from one solid forging, and that plan was eventually discarded. Artillerists have learnt that the strain produced by an explosive force operating in the interior of a cannon is not felt equally throughout the thickness of the metal from the bore to the exterior, but varies inversely as the square of the distance of each portion of the metal from the seat of effort. For example, in a gun cast solid, if two points be taken, one at the distance of one inch from the bore, and the other four inches from the bore, the metal at the former point will during the explosion be strained sixteen times as much as that at the distance of four inches. The greater the thickness of the material, the greater will be the inequality between the strains acting at the points respectively nearest to and farthest from the interior. The metal nearest the seat of explosion may thus be strained beyond its tensile strength, while that more remote is in imperfect accord with it. In such a case, disruption of the metal at the inner surface ensues, and extends successively through the whole thickness to the exterior, thus entailing the destruction of the gun.

This source of weakness is guarded against by the construction of what is termed the built-up gun, in which the several parts tend to mutual support. This gun consists of an inner tube, encircled and compressed by a long 'jacket' or cylinder, which is shrunk around the breech portion with the initial tension due to contraction in cooling. Over the jacket and along the chase, other hoops or cylinders are shrunk on successively, in layers, with sufficient tension to compress the parts enclosed. The number and strength of these hoops are proportionate to the known strain that the bore of the gun will have to sustain. The tension at which each part is shrunk on is the greater as the part is farther removed from the inner tube; the jacket, for example, being shrunk on at less tension than the outer hoops. The inner tube, on receiving the expansive force of the explosion, is prevented by the compression of the jacket from being forced up to its elastic limit; and the jacket in its turn is similarly supported by the outer hoops; and on the cessation of the internal pressure the several parts resume their normal position.

This system of construction originated in England, and is now in general use. The first steel guns on this principle were those designed by Captain Blakely and Mr J. Vavasseur, of the London Ordnance Works. At the Exhibition of 1862, a Blakely 8.5-inch gun, on the built-up system, composed wholly of steel, was a feature of interest in the Ordnance section. The plan devised by Sir W. Armstrong, and carried into effect for a series of years at Woolwich and at the Armstrong Works at Elswick, consisted in enclosing a tube of steel within a jacket of wrought iron, formed by coiling a red-hot bar round a mandrel. The jacket was shrunk on with initial tension, and was fortified in a similar manner by outer hoops of the same metal. The want of homogeneity in this gun was, however, a serious defect, and ultimately led to its abolition. The difference in the elastic properties of the two metals caused a separation, after repeated discharges, between the steel tube and its jacket, with the result that the tube cracked from want of support. Both at Woolwich and at Elswick (described on a later page), therefore, the wrought-iron gun has given place to the homogeneous steel built-up gun, which is also the form of construction adopted by the chief powers of Europe and by the United States of America.

The failure of some of his solid-cast guns led Krupp, about 1865, to the adoption of the built-up principle. With few exceptions, the inner tube of a Krupp gun is forged out of a single ingot, and in every case without any weld. The ingot destined to form the tube has first to undergo a prolonged forging under the steam-hammers, by which the utmost condensation of its particles is effected. It is then rough-bored and turned, and subsequently carefully tempered in oil, whereby its elasticity and tensile strength are much increased. It is afterwards fine-bored and rifled, and its powder-chamber hollowed out. The latter has a somewhat larger diameter than the rest of the bore, this having been found an improvement. The grooves of the rifling are generally shallow, and they widen towards the breech, so that the leaden coat of the projectile is compressed gradually and with the least friction. The jacket and hoops of steel are forged and rolled, without weld, and after being turned and tempered, are heated and shrunk around the tube in their several positions, the greatest strength and thickness being of course given to the breech end, where the force of explosion exerts the utmost strain. The completed gun is mounted on its appropriate carriage, and having been thoroughly proved and tested and fitted with the proper sights, is ready for service. The testing range is at Meppen, where a level plain several miles in extent affords a suitable site for the purpose.

For many years all guns of the Krupp manufacture have been on the breech-loading system, and he has devoted much time and ingenuity to perfecting the breech arrangements. The subject of recoil has also largely occupied his attention. In the larger Krupp guns the force of recoil is absorbed by two cylinders, filled with glycerine and fitted with pistons perforated at the edges. The pistons are driven by the shock of the recoil against the glycerine, which is forced through the perforations. In England a similar arrangement of cylinders, containing water as the resisting medium, has been found effective; and in America, petroleum is employed for the same purpose. The advantages of the use of glycerine are that in case of a leak it would escape too slowly to lose its effect at once, and it is also more elastic than water, and is less liable to become frozen.

The resources of Krupp's establishment are equal to the production of guns of any size that can conceivably be required. He has made guns of one hundred and nineteen tons weight. The portentous development of the size and power of modern ordnance is exemplified by these guns and the Armstrong guns of one hundred and eleven tons made at Elswick. Amongst the class of modern cannon, one of the most powerful is Krupp's seventy-one-ton gun. This, like all others of his make, is a breech-loader. Its dimensions are—length, thirty-two feet nine inches; diameter at breech end, five feet six inches; length of bore, twenty-eight feet seven inches; diameter of bore, 15.75 inches; diameter of powder-chamber, 17.32 inches. The internal tube is of two parts, exactly joined; and over this are four cylinders, shrunk on, and a ring round the breech. Its rifling has a uniform twist of one in forty-five. It cannot possibly be fired until the breech is perfectly closed. Its maximum charge is four hundred and eighty-five pounds of powder, and a chilled iron shell of seventeen hundred and eight pounds.

Krupp did much to promote the welfare and comfort of his workpeople. For their accommodation, he erected around Essen nearly four thousand family dwellings, in which more than sixteen thousand persons reside. The dwellings are in suites of three or four comfortable rooms, with good water-arrangements; and attached to each building is a garden, large enough for the children to play in. There are one hundred and fifty dwellings of a better kind for officials in the service of the firm. Boarding-houses have also been built for the use of unmarried labourers, of whom two thousand are thus accommodated. Several churches, Protestant and Catholic, have also been erected, for the use of his workmen and their families. There have likewise been provided two hospitals, bathing establishments, a gymnasium, an unsectarian free school, and six industrial schools—one for adults, two for females. In the case of the industrial schools, the fees are about two shillings monthly, but the poorest are admitted free. A Sick Relief and Pensions Fund has been instituted, and every foreman and workman is obliged to be a member. The entrance fee is half a day's pay, the annual payment being proportioned to the wages of the individual member; but half of each person's contribution is paid by the firm. There are three large surgeries; and skilful physicians and surgeons, one of whom is an oculist, are employed at fixed salaries. For a small additional fee each member can also secure free medical aid for his wife and children. The advantages to members are free medical or surgical treatment in case of need, payment from the fund of funeral expenses at death, pensions to men who have been permanently disabled by injuries while engaged in the works, pensions to widows of members, and temporary support to men who are certified by two of the physicians as unable to work. The highest pension to men is five pounds monthly, the average being about two pounds sixteen shillings monthly. The average pension to widows is about one pound fourteen shillings monthly.

The firm have made special arrangements with a number of life insurance companies whereby the workmen can, if they choose, insure their lives at low rates. They have formed a Life Insurance Union, and endowed it with a reserve fund of three thousand pounds, from which aid is given to members needing assistance to pay their premiums. An important institution in Essen is the great Central Supply Store, established and owned by the firm, where articles of every description—bread, meat, and other provisions, clothing, furniture, &c.—are sold on a rigidly cash system at cost price. Connected with the Central Store are twenty-seven branch shops, in positions convenient for the workpeople, placing the advantages of the system within the easy reach of all.

The original name, 'Frederick Krupp,' has been retained through all vicissitudes of fortune as the business title of the firm. The small dwelling in which Alfred Krupp was born is still standing, in the midst of the huge workshops that have grown up around it, and is preserved with the greatest care. At his expense, photographs of it were distributed among his workmen, each copy bearing the following inscription, dated Essen, February 1873: 'Fifty years ago, this primitive dwelling was the abode of my parents. I hope that no one of our labourers may ever know such struggles as have been required for the establishment of these works. Twenty-five years ago that success was still doubtful which has at length—gradually, yet wonderfully—rewarded the exertions, fidelity, and perseverance of the past. May this example encourage others who are in difficulties! May it increase respect for small houses, and sympathy for the larger sorrows they too often contain. The object of labour should be the common weal. If work bring blessing, then is labour prayer. May every one in our community, from the highest to the lowest, thoughtfully and wisely strive to secure and build his prosperity on this principle! When this is done, then will my greatest desire be realised.'

Germany has become a formidable competitor to Great Britain in the iron and steel trade, and German steel rails, girders, and wire come in freely to this country. From reports we learn that Great Britain produced in 1882 8½ million tons of iron and 5 million tons of finished iron and steel, while the production of Germany was then less than 3½ and 2½ million tons respectively. English production had fallen to 7½ million tons of iron and 4 million tons of finished iron and steel in 1895, while Germany had risen to 5 million tons and 6 million tons respectively.

Contrary to what has been commonly believed, it appears that the difference all round in wages amongst ironworkers, as between England and Germany, is not great.

Chicago, Pittsburg, Buffalo, and New York are the chief centres of the American iron and steel trade, the production of pig-iron in 1895 being about 9¼ million tons, whereas in 1880 it was well under 4 million. At present over 4 millions of tons are produced of Bessemer pig-iron.