AMERICAN INSTITUTE. 



187 



inch water space around the case, making about 350 feet fire 

 surface. 



This engine is rotary, after B. Holly's patent, as also the two 

 pumps. The area of the piston to the engine is twenty-five inch- 

 es, and runs from 1 to 600 revolutions per minute, and can be 

 run either high or low pressure, as desired. The pressure of 

 steam used is from twenty to seventy lbs. In connection with 

 the engine and pump we use Mr. Holly's improved condenser, 

 which is simply leading the exhausted steam directly into the 

 suction of the pump, thereby increasing the power of the engine 

 and preventing the hose from freezing in cold weather. 



The boiler is supplied with water from an iron tank in front 

 by a small donkey engine made after the same patent. The 

 engine and pump both being enclosed in one case and not occupy- 

 ing over eight by ten inches space. The machine is also furnished 

 with a fan, which is set in motion as soon as the engine is started 

 from the fiouse, it being run by a pulley attached to one of the 

 back wheels. The whole arrangement is very simple, and not 

 liable to get out of order, and can be run by an ordinary engi- 

 neer. [^ silver medal aivarded. 



H<^'-ron-;,MoiNX ii' f^^^^"^^^ 



Gale'i Patent Steam I Ire Regulator. 



Steam and Fire Regulator. 



Wm. S. Gale, 11 Elizabeth-streetj and Wm. Noyes, 335 Broad- 

 way. [i/5 silver medal awarded,, 



