But the world must have coal, for, used for our great boilers, it drives our powerful locomotives, sends mighty vessels plowing across the ocean, and supplies the power which turns the wheels of industry, both great and small. Yes, the world must have coal. So Uncle Sam, in pity for the miners who brave these awful dangers, has bought a mine at Bruceton, a short distance from Pittsburgh. There the government is making experiments to find out the causes of explosion, aiming in this way to protect the miners by lessening their dangers.

Much of the coal is made into coke by burning out certain gases in open-air ovens. Thousands of these[179]
[180] ovens are located in the Pittsburgh district, and their fires at night illuminate the country for miles. The coke is used as fuel in the steel furnaces of Pittsburgh, Cleveland, Chicago, and other cities.

A little more than fifty years ago petroleum, or rock oil, was discovered near Pittsburgh, and although oil has since been found in many other places, Pittsburgh is still one of the great centers for this product. Crude petroleum as it comes from the earth is a liquid, formed from the decay of plants and animals long ago buried underground. It is obtained by sinking wells, or pipes, into oil-bearing rock, which is very porous. Sometimes the pipes are sunk a quarter of a mile deep. The average yield is from 50 to 75 barrels a day, and occasionally a pipe well is found which yields as high as 1000 barrels.

Sometimes a well stops flowing. Then the oil must be pumped from the earth or else forced out by the explosion of dynamite. Such a well is spoken of as a “shot well.” When a well is shot, a vast column of oil is thrown into the air, just as water is thrown up in a geyser or hot spring, by the action of gases under ground.

Pittsburgh makes great storage tanks for the oil, as well as apparatus for drilling wells, and supplies these not only to our own country but to every foreign land in which oil is found.

When petroleum is heated it gives off vapors, varying according to the heat. These vapors are then condensed and form many products which are now in every-day use, such as kerosene, gasoline, naphtha, and benzine. Vaseline is what remains in the vats after heating the petroleum. Paraffin is another product. Pittsburgh manufactures all these and supplies them to the world.

The discovery of natural gas about twenty-five years ago, and its use as a fuel, attracted the attention of the world to Pittsburgh as a center of cheap fuel. Natural gas is found in and around oil fields, so it is supposed that the gas and the oil have the same origin. The porous rock in which the gas is found is usually covered with clay rock, or shale, which prevents the gas from escaping. Natural gas, like petroleum, is obtained by sinking pipes. When the gas is reached, it rushes out with great force. Large quantities of it were formerly used in Pittsburgh's glass factories and iron works, but its greatest use to-day is for lighting and heating.

The city of Pittsburgh stretches for 7 miles along the Allegheny, about the same distance on the Monongahela, and entirely covers the space between. The city of Allegheny, across the Allegheny River, has recently been annexed, thus giving Pittsburgh an area of 38 square miles. The two cities, with the river between, remind us of Brooklyn and Manhattan.

The city's water supply is taken from the Allegheny River and is purified in the largest single filtration plant in the world.

The main business section covers the V-shaped space between the two rivers—known as the Point—and extends into the streets further back. Still beyond are heights upon which are many beautiful parks, fine residences, and splendid public buildings, including the Carnegie Museum, Library, and Technical Schools, and the buildings of Pittsburgh University.

Though the population of the “Steel City” was at first mainly Scotch-Irish, it now includes citizens from almost every nation in Europe. The workmen in its factories are of at least thirty nationalities. Side by side stand English, Germans, Welsh, Irish, Scotch, Negroes, Jews, Italians, Syrians, Swedes, Greeks, Slavs, Poles, and Hungarians.

In one section of the city there is a distinct German center, whose inhabitants speak German and have German newspapers. Another section has received the name of Little Italy because of the number of Italians who have come there to live. Six papers are published for these people in their own tongue. In Little Italy are many of the fruit stands and market places which in this country seem to furnish a favorite employment for the sons of Italy.

In still another section, which is called the Ghetto, live the Jews, whose conversation is largely carried on in Yiddish, and whose newspapers are printed in that language. All of these foreign-born people have adopted the dress of American citizens, and their descendants will soon become Americanized in manners and language. To-day their foreign ways make them the more interesting.

But the laborers are by no means the only inhabitants of Pittsburgh. There are many wealthy residents, whose palatial homes, built beyond the reach of the soot and smoke, far away from the noises of the great business thoroughfares, are in great contrast to the workmen's simple homes near the furnaces.

Pittsburgh can boast of many great men. It is the home of Andrew Carnegie, whose reputation for wealth and benevolence is world wide. He it was who conceived the idea of founding free libraries in different cities, they in turn to support these libraries by giving an annual sum for that purpose. His first offer was to his own city. In 1881 he proposed to give Pittsburgh $250,000 for a free public library if the city would set apart $15,000 each year for its care. The offer was refused, and the library was given to Allegheny instead. Later Mr. Carnegie gave Pittsburgh an Institute and Library combined, for the support of which the city gives $200,000 each year. The Carnegie Institute is a massive and beautiful building in Schenley Park. It covers 5 acres of land and is filled with treasures of art and literature. To-day there are nine Carnegie libraries in Pittsburgh, containing over 360,000 volumes.

George Westinghouse was another Pittsburgh capitalist. His early days were spent in making agricultural implements in Schenectady. He was called Lazy George because he was always making pieces of machinery to save doing work with his hands. Later, by his invention of air brakes for trains, he became rich. Choosing Pittsburgh as his home, he established in and near the city the great Westinghouse Electric Company. It was Mr. Westinghouse who gave to Pittsburgh natural gas, conveying it through forty miles of pipe from Murrysville.

Towering above Pittsburgh are high hills, which are reached from the business districts by inclined planes. Passengers and freight are carried up the inclines in cable cars. Up the steepest of these planes, the Monongahela, whose summit is four hundred feet above the river, the railroad runs through a tunnel and brings the passengers out upon a high bluff.

From the heights above the city one views the surrounding country—a wonderful panorama of hills and valleys, with the three great rivers, spanned by seventeen splendid bridges, stretching away in the distance. In every direction are towns called “little Pittsburghs,” where live the workers engaged in the gigantic industries of the Pittsburgh district. And looking down, one sees the Point—the center of this great city, the heart of the “workshop of the world.”

QUESTIONS FOR REVIEW AND STUDY

1. Compare Pittsburgh with New Orleans in location and in interests.

2. Tell how Fort Pitt grew into the great city of Pittsburgh and give two causes for its growth.

3. Where does Pittsburgh get her iron ore, coal, and petroleum?

4. In what manufactures does the city lead the world?

5. What great advantages does its location on the Ohio River give Pittsburgh?

6. Where are her great steel works, and what do they manufacture?

7. Describe the mine cities and the miners. Tell of their dangers and how these are to be lessened.

8. How is petroleum obtained? What products in daily use are made from it?

9. Give some facts about natural gas and its use in Pittsburgh.

10. Why is Pittsburgh called the “workshop of the world”?

11. Name two famous men of Pittsburgh and tell what they have done for the city and for the world.

12. Examine a map and find what shipping ports are within easy access of Pittsburgh.

13. Find by what route ore and other material shipped by way of the Great Lakes reach Pittsburgh.

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