Other points yet remain for notice before we quit the subject of domestic life. And first, as in our catalogue of chambers we have mentioned the library, a few words on books and writing materials will not be out of place. The books of the Greeks and Romans were written on long rolls of parchment, or sheets of papyrus connected by glue. This long roll of paper or parchment was fitted at each end to a wooden roller. The reader wound that part of the roll which he had perused on to the left-hand roller, and unrolled the next page from the right-hand roller, proceeding thus until he reached the end of the volume. The writing was arranged in lines which ran lengthwise along the roll, and were divided into columns or pages of a convenient width. The back of the roll was stained, usually of a saffron color, and the volume provided with a yellow or purple parchment case. The ends of the rollers were often ornamented with carved bosses, and a label bearing the title was affixed to the roll. The ink for writing was similar to the Indian ink in use among ourselves; and was prepared either from lamp-black or the dye of the cuttle-fish. Red ink was also employed. The pen was formed from a reed, split and shaped much like our own quills. The booksellers in Rome were, of course, few when compared with the same class in a modern town; but their numbers were great, from the fact that they not only sold books, but also transcribed them. But nations had their public and private libraries, and the value of some collections was immense. The books in a library were arranged in cedar-wood presses round the walls.

The ordinary apparatus for writing consisted of thin wooden tablets, overlaid on one side with a coat of wax, on which the letters were traced by indentation with a pointed metal pencil, or style. The waxen side of each tablet was furnished with a rim, to prevent the characters from rubbing. Two tablets, commonly, and sometimes three, were bound together so as to form a small book; and when three were united, the centre leaf had a layer of wax on both sides. The frames were pierced with holes, and when the letter or memorandum was finished, the adjacent edges of the closed tablets were bound together by a thread passed through the holes, knotted and secured by a seal of simple wax. The signets used for impression were cut in various devices; and this engraving of gems is an art in which the Greeks and Romans excelled most highly. Some tablets have been discovered in which the writing ran from right to left. The custom of using wax tablets again appears in the middle ages.

In their contrivances for measuring time the ancients were strikingly deficient. The length of their hours depended on that of the day, inasmuch as they divided the space between sunrise and sunset into twelve equal portions. Even their sun-dials were but imperfect; and the clepsydrÆ or hour-glasses, in which the flow of water, not of sand, was the measure of time, were very inaccurate, in spite of all improvements effected in them. They were at first constructed of bronze or earthenware, but afterward of glass. Ctesibius, an Alexandrian mathematician, invented a kind of water-clock, B. C. 135, in which the dropping of water turned various wheels, and raised a small statue, which pointed to the hours. But the great element of inaccuracy, the unequal flow of the liquid, was manifestly present in this contrivance. Punctuality among the ancients must have been no more than a coincidence of guesses.