366 



" The capacity of the engine is such that it will easily deliver into 

 the reservoir one million gallons in twenty-four hours, through four 

 hundred and sixty-five feet of twelve-inch pipe, at a height of one 

 hundred and sixty feet." 



" It is about twenty -five horse-power. It has two double-acting 

 water-pistons; and each piston-rod passes through a high-pressure 

 into a low-pressure cylinder, in which the steam is first used at high 

 pressure, and afterwards at low pressure. The steam-cylinders 

 are to be protected by a steam-jacket, and a covering of felt and 

 black walnut; and are provided with balanced steam slide- 

 valves. Steam water pressure and vacuum gauges are attached to 

 the engine, and there is also to be a counter to record the number 

 of strokes." 



" There are four single-acting vertical air-pumps, worked by two 

 half-beams. The engine draws the water from the well through a 

 suction-pipe which delivers it into the water-cylinders. This suction- 

 pipe is fitted at its base with a ' foot-valve,' to keep it always full 

 of water." 



The diameter of the suction-pipe is 12 inches. 



" water-piston is 14 ' : 



Length of stroke 17 " 



Diameter of the two high-pressure cylinders 14 " 



" " low " " 24 " 



" The speed of the engine is from fifty to eighty strokes per 

 minute, as may be desired. The ordinary speed is about sixty strokes, 

 with the pressure of the steam forty pounds and the vacuum twenty- 

 five inches." 



BOILER. 



The boiler is of the type known as the horizontal tubular. It is 

 fifteen feet long, four feet in diameter, and contains thirty-nine tubes 

 three inches diameter. The grate surface has an area of sixteen 

 square feet, and the heating surface of the boiler is seven hundred 

 and fifty square feet. The furnaces are under the shells of the boiler, 

 the fire returning through the tubes. The boiler fronts are entirely 

 of iron, and are very substantial and neat in appearance. The boilers 

 are fed by a small duplex pump. 



BOILER HOUSE. 



The boiler house is situated on the surface of the ground near 

 the well, and is constructed of pressed brick with Ohio stone 



