Prior to its presentation to the National Museum, the _John Bull_ had appeared at the Centennial Exhibition at Philadelphia in 1876, and at the Exposition of Railway Appliances at Chicago in 1883. In early 1893, the locomotive and tender were taken from Washington to New York City, and on April 17 proceeded under steam, pulling two old cars of the period of 1836 (figure 34), to the World’s Columbian Exposition at Chicago. It arrived without mishap on April 22 after having covered 912 miles. The locomotive and tender were returned to the Museum in December 1893 after having made daily demonstration runs at the exposition. They returned to Washington under steam via Pittsburgh, Altoona, Harrisburg, and Baltimore. The next time the locomotive left the Museum’s confines was for a brief sojourn at the Fair of the Iron Horse in 1927 (figure 35). More recently it appeared at the Chicago World’s Fair in 1933 and the New York World’s Fair in 1939 and 1940. In early 1940, a full sized operable replica of the _John Bull_ locomotive (figure 36) was made at the Altoona shops of the Pennsylvania Railroad Co. The cylinder dimensions of 11 by 20 inches were apparently known by the shops at that time, as the drawings made then for use in building the replica show the bore and stroke to be 10⅞ by 20 inches. Perhaps the bore of the original locomotive was also 10⅞ inches in 1831, and was increased to 11 inches through many years of wear. However, the figure of 9 inches for the bore, so often used in the past, is definitely incorrect. [Illustration: Figure 33.—As this early photo shows, the _John Bull_ toward the end of its active career had a cab and large smokestack, and an 8-wheeled tender was used.] [Illustration: Figure 34.—_John Bull_, with train of 1836-period cars, en route to World’s Columbian Exposition at Chicago in 1893.] [Illustration: Figure 35.—Original _John Bull_, with replica of tender built in 1927, at the Fair of the Iron Horse, October 5, 1927.] [Illustration: Figure 36.—Full sized operable replica of _John Bull_, built in 1940 by Pennsylvania Railroad Co.] [Illustration: Figure 37.—Model of _John Bull_ and tender, in National Museum, showing appearance of original 1831 design. Note side rod connecting the two axles.]