THE STEAM LOCOMOTIVE 



heating surface of the Rocket was one hundred and 

 thirty-eight square feet, that of the new locomotive 

 6,393 square feet. To heat this great surface oil is 

 used for fuel, so that the task for the fireman is lighter 

 than on many locomotives less than one-half the size. 

 On this locomotive there are two sets of cylinders 

 driving two sets of driving wheels on each side, making 

 a total of sixteen drivers in all. From the size of these 

 drivers it is evident that the engine is designed for 

 strength rather than speed, although of course rela- 

 tively high speed can be attained if desired. On the 

 section of road over which it operates there is a maxi- 

 mum grade of one hundred and sixteen feet per mile, 

 and it was for negotiating such grades with full loads 

 that the locomotive was designed. 



[151] 



