In Fig. 99 is shown the “John Bull,” now in the National Museum at Washington, D. C. It was built by Stephenson & Co. for the Camden & Amboy Railroad, and was brought over from England and put into service in 1831. During the Columbian Exposition at Chicago in 1893, after a long rest in the Washington Museum, it made its way under its own steam to Chicago, drawing a train of two cars a distance of 912 miles without assistance. It further distinguished itself while there by carrying 50,000 passengers over the exhibition tracks, and although sixty-two years of age at the time, showed itself quite capable of performing substantial work. [Illustration: FIG. 100.--BALDWIN’S “OLD IRONSIDES,” 1832.] Most of the early locomotives used in America were imported from England, but our inventors soon commenced making them for themselves. The Baldwin Locomotive Works, of Philadelphia, has had a notable career in the field of locomotive construction. “Old Ironsides,” built in 1832, was the first Baldwin locomotive, and it did duty for over a score of years. It is shown in Fig. 100. It had four wheels and weighed a little over five tons. The drive wheels were 54 inches in diameter, and the cylinder 9½ inches in diameter, 18 inches stroke. The wheels had heavy cast iron hubs with wooden spokes and rims and wrought iron tires, and the frame was of wood placed outside the wheels. The boiler was 30 inches in diameter and had 72 copper flues 1½ inches in diameter, 7 feet long. The price of the locomotive was $4,000, and it attained a speed of 30 miles an hour, with its train. [Illustration: FIG. 101.--EIGHT-WHEEL PASSENGER EXPRESS LOCOMOTIVE, 1863.] [Illustration: FIG. 102.--EXPRESS PASSENGER LOCOMOTIVE, 1881.] In Fig. 101 is shown a standard type of passenger locomotive of the period of 1863, and in Fig. 102 is illustrated the period of 1881, which latter represents perhaps the greatest epoch of railroad building in the history of the world. According to Poor’s Manual, $1,000,000 a day was the estimated cash outlay on this account for the three years up to the close of 1882, during which period 28,019 miles of railroad were opened up in the United States, or more than enough to girdle the entire earth. Some idea of the wonderful growth of the railroad industry during this period is given by the following tables, which represent the yearly production of locomotives by the Baldwin Company alone for forty years prior to this period: