CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 65 



it built " Old Ironsides," which was tried out late in 1832. His 

 second locomotive was the " E. L. Miller," completed in 1834, which 

 had very little that was decidedly original, but old forms were com- 

 bined in a shape that produced the best locomotive then built, and 

 the American locomotive of to-day is undoubtedly a direct develop- 

 ment of the " E. L. Miller." Its particular features were a horizon- 

 tal boiler with Bury's haystack fire box, one pair of driving wheels 

 located behind the fire box, the Jervis four-wheel swiveling truck 

 under the smoke box, and outside wooden frames sheathed with 



FIG. 28. TKEVITIIICK LOCO.MOTIVE, 1804. 



iron. The cylinders, 10 by 16 inches, were secured between the smoke 

 box and frames and transmitted power to the driving wheels through 

 a half-crank axle. The engine weighed in working order about 

 16,600 pounds. 



Model of Trevithick Locomotive, 1804. Made in the Museum. 



While building some of his high-pressure steam engines at the 

 Pen-Y-Darran Iron Works near Merthyr, Tydvil. in 1803, Trevi- 

 thick undertook to construct a steam locomotive to haul trucks on a 

 tramway a distance of about 9 miles. The engine was completed 

 ■early in 1804, and upon its trial drew five wagons with a load of 

 13 tons at a speed of about 5 miles an hour, with a coal consumption 

 o2103— 22 o 



