The factory, which closed the end of a street, was built about four sides of a small square, and the center of this square was occupied by a large room with overhead ventilation and lighting, the glass fluted and sloping as the ribs of a Venetian blind may be made to slope, so that, in summer, the sun’s rays would be tempered to the workers under it. Here, at the tables nearest the entrance, men were employed at designing patterns of cardboard and working, amid busy calculations, with rulers and T-squares, like so many architects’ draughtsmen. From them the completed patterns were taken to other tables at which they met the cloth accepted in the first room, other workmen tracing the designs in chalk upon pieces of the cloth. The problem of these second workers, Forbes explained, was to arrange the designs in such a way that almost no shred of cloth was wasted. Luke observed that they solved it with astonishing skill; and, as each piece was completed, a ticket was roughly sewn on it with written directions for its further progress and blanks to be filled in by the signature of each worker responsible for its future steps. Then came what to Luke was the most wonderful part of the work. Nineteen pieces of unmarked cloth to be made into suits of the same style as that on which the chalk pattern had been outlined, were laid under that piece and the whole bundle given to a man at a large table. Through a slit in the center of this table, a knife of incredible strength and keenness plunged rapidly up and down. The man in charge forced the bundle against the knife, deftly pushing it forward, so that the blade followed the lines drawn upon the top piece, and in three minutes a score of suits of clothes were cut into their various parts and were being sorted and ticketed and signed for waiting boys to carry them to the sewing-machines. "Those patterns look like the parts of a jig-saw puzzle," said Luke, "and that knife looks like a cross between a jig-saw and the guillotine." "It cuts twenty suits at a time," said Forbes gravely, "and the bottom one doesn’t vary the thirtieth of an inch from the one on top." "Twenty suits!" Luke wanted to rub his eyes. "Yes; but the inventor is still at work on the knife. We hope soon to get one that will do three dozen." At each corner of the building was an elevator and a stairway, the latter walled in so to serve as a fire-escape. Forbes took Luke up one of these stairways, a broad and easy flight of which the corners at each landing were protected by curved wainscoting to prevent jamming in case of panic. The three floors above ground contained the rooms in which the sewing was done and one room known as the matching-room. All seemed well lighted and well aired and well protected by the overhead pipes of an automatic sprinkling-plant.