CATALOGUE OF THE MECHANICAL ENGINEERING COLLECTION. 67 



attained a speed of 12 miles an hour. It ran for some weeks, when 

 a rail broke and it left the road and turned over. Trevithick, having 

 expended all his means to convince the public of the utility of the 

 locomotive, was compelled to give up his endeavors. There is no 

 record to show that Trevithick ever resumed his labors in this branch 

 of engineering. Cat. Nos. 180,734-735 U.S.N.M. 



Photograph of "locomotion," Engine No. 1, (1825) of the Stockton and 

 Darlington Railway, England. 



This is the first locomotive built for the first railway in the world 

 and constructed for general traffic. The photograph was made at 

 the Chicago Exposition of Railway Appliances in 1883, when the 

 locomotive was exhibited by the Stockton and Darlington Railway. 



The engine has two vertical cylinders, 10 inches in diameter by 24 inches 

 stroke each driving by side-connecting rods a pair of 48-inch driving wheels. 

 These wheels are of cast iron and are coupled together by external rods that 

 elevate the driving crank pins of the ordinary type driven by rocking shafts, 

 which both receive their motion from a single eccentric on the leading axle, one 

 shaft being rocked directly and the other through a " bcU-crank " lever. A 

 platform runs along each side of the boiler, and from one of these the engmeer 

 has control of the valve rods for disengaging and reversing. The tractive 

 power for this engine per pound of mean pressure in the cylinders was 50 

 pounds, but the boiler pressure used was only 25 pounds per square inch. The 

 exhaust steam from both cylinders was conveyed by two waste pipes to the 

 chimney. The feed water was forced into the boiler by a single feed pump, 

 4 inches in diameter, driven by a lever from the crosshead. The boiler is 

 10 feet long and 4 feet in diameter, delivering into the chimney, which is 17A 

 inches in diameter. 



The wheel base of the engine is 5 feet 4 inches, and the weight in working 

 order is 6* tons. The tender is built of timber and holds fifteen hundredweight 

 of coal and carries an iron tank containing 240 gallons of water. (The Science 

 Museum.) 



This locomotive is estimated to have been about 20 horsepower and 



to have a speed of about 8 miles an hour. ^^^r^r 



Cat. No. 180,760 U.S.N.M. 



Model of the " Rocket " Locomotive and Tender, 1829. Made in the 



Museum. 



This model represents the celebrated engine constructed by R. 

 Stephenson & Co. in 1829 to compete for the prize of £500 offered by 

 the Liverpool and Manchester Railway in England to the makers 

 of the most successful locomotive. 



The competition commenced on October 6 and continued for eight 

 days " The Rocket " won the competition against four other entries. 

 These were "The Novelty," made by Messrs. J. Braithwaite and J. 

 Ericsson; "The Sans Pareil," made by Timothy Hackworth; "The 



