“cui of Heat evolved frou Aimoapherie dire 45 
“employed for the former purpose ‘is represented in the figure be- 
low, which is an end view of the whole machine, and consists 
essentially of a large double acting force pump,A; a smaller force 
aie B; and a reservoir or air magazine, C. 
\\ 
The larger pump, A, is constructed on the common riage 
well known to mechanics, of the double acting force pump for 
e pipes e,e, which lead to the reservoir. The pump is 
thittien inches in diameter with a twenty-four inch stroke of pis- 
ton; and consequently, has a capacity, exclusive of the space oc- | 
cupied by ~e piston rod, of 3144 cubic inches. 
is large pump there was a smaller condensing pump, 
(not seen | in the figure,) four inches in diameter, seventeen 
