LOCOMOTIVE ENGINE AND RAILWAY GRADIENTS. 



167- 



In the last five experiments contained in this Table with, 

 the single engine, the duty performed approximates closely 

 to that of the double engine, the rate of travelling and the 

 load carried being nearly the same. It will, however, be 

 observed, that the cylinders of the single engine. No. 39, are 

 only 15 inches, whereas the assistant engine in the six pre- 

 vious experiments, No. 45, had cylinders of 16 inches, which 

 reduces the duty of the double engines to nearly the same 

 paroportion. as that recorded in the previous experiments. 



