66 BULLETIN 119, U. S. NATIONAL MUSEUM. 



of about 25 pounds a mile. It also drew empty wagons up an 

 incline of one in eighteen at the rate of 4 miles an hour. Owing 

 to the frequent breakages of the cast-iron tram parts, however, the 

 locomotive was abandoned as such and used for stationary purposes. 

 The model, therefore, represents the first steam engine that ran on a 

 track by the force of high-pressure steam, relying wholly upon the 

 adhesion of smooth wheels. 



The locomotive had a single horizontal cylinder Si inches in diameter by 

 54 inches stroke, inclosed in the boiler, which was of cast iron, 6 feet long and 

 4^ inches in diameter, with a wrought-iron furnace flue. The piston-rod cross- 

 head was controlled by round guide bars, and from it passed two return con- 

 necting rods to the cranks on the flywheel shaft, on which was a spur wheel 

 gearing into a larger intermediate spur wheel carried by a stud on the side 

 of the boiler ; this wheel geared into a spur wheel on each of the two travelling 

 axles, so that the adhesion due to the total weight of the engine was available 

 for traction. The traveling wheels were 45 inches in diameter and rovolved 

 at practically the same speed as the crank shaft, so that the tractive effort 

 per pound of mean steam pressure in the cylinder was about forty pounds. 

 The valve arrangement consisted of a four-way cock worked by a tappet rod 

 from the crosshead. The steam was delivered into the chimney, where it was 

 noticed that the waste heat rendered it invisible, and it made the draft much 

 stronger. {The Science Museum.) 



The total weight of the engine in working order was five tons. 



Cat. No. 180,058 U.S.N.M. 



Lithograph of Trevithick's Newcastle-upon-Tyne Railway Locomotive. 

 1805, from the " Memorial Edition of the Life of Richard Trevithick. 

 E. and F. N. Spon, London, England, 1883." Five views presented by 

 Trevithick's granddaughter through Colonel Davis, of London. 



This locomotive was built in Newcastle about the end of 1804. It 

 differed from its predecessor (the South Wales locomotive) in being 

 fitted to run on a railway by using flanged wheels. 



Cat. No. 180,740 U.S.N.M. 



Print of Trevithick's London Circular Railway and " Catch-me-who-can " 

 Locomotive, 1808. Woodcut from the " Memorial Edition of the Life 

 of Richard Trevithick, E. and F. N. Spon, London, England, 1883." Pre- 

 sented by Trevithick's granddaughter through Colonel Davis, of London. 



Between the close of 1800 and May, 1805, Trevithick had con- 

 structed two road locomotives in Cornwall, a tramway locomotive 

 in Wales, and one railway locomotive in Newcastle. All these had 

 some form of blast pipe. For the next three years Trevithick did 

 nothing with the locomotive, but in 1808 he constructed, at his own 

 cost, a locomotive and a circular railway on the southern half of 

 the present Euston Square, London. The engine working on this 

 railway was called " Catch-me-who-can." It weighed 10 tons and 



