Figure 1 7. — Full sized operable replica of Davis' York, built in 1 927 by Balti- 

 more and Ohio Railroad Co. 



As the first practical and generally serviceable locomotive 

 of the early Baltimore and Ohio Railroad, the Tork influ- 

 enced considerably the design of the company's subsequent 

 locomotives. Within a year Davis had constructed several 

 locomotives of a generally similar design, all with vertical 

 boilers (see p. 47). 



The Tork had wheels 30 inches in diameter, weighed about 

 3^2 tons, and had a top speed of 30 miles an hour. Not long 

 after its construction, it was drastically altered in design and 

 appearance. The vertical cylinders were removed from the 

 opposite sides of the boiler, where they had operated the four 

 wheels by means of direct-acting rods and trussed side bars, 

 and inclined adjacent cylinders were located behind the 

 boiler, where they operated by means of gearing on the rear 

 axle only. 



The modern replica, however, represents the Tork as it was 

 originally designed and constructed. It operates on a steam 

 pressure of 1 15 pounds per square inch. The original is said 

 to have operated on 100 pounds per square inch, and it 

 burned anthracite coal, a very early use of that fuel in loco- 

 motives. 



25 



