108 THE HYDRAULIC RAM. 



10. Fall from surface of dam to ram 7 feet. 



Length and size of supply pipe not given. 



Volume of water discharged by stream " 



Length of discharging pipe, (size not given) 126 rods. 



Elevation of discharging pipe from ram to cistern 75 feet. 



Discharges 25 barrels of water in 24 hours. 



11. Fall from spring to ram 11 feet. 



Size of supply pipe, 2 inches calibre ; length 42 " 



Length of discharging pipe, inch calibre 75 rods. 



Elevation of discharging pipe from ram to cistern 98 feet. 



Discharges over 30 barrels of water per day. 



NOTE. The size, strength, and weight of the supply and 

 discharging pipes must be in proportion to the head or 

 pressure on them. They are proportioned and adjusted to 

 the capacity of the ram by the manufacturer, and are gen- 

 erally sold with the machine. 



When a very large supply of water is required for manu- 

 facturing or other purposes, and a stream of sufficient vol- 

 ume and fall is obtained, it is better to set two or three 

 rams of a smaller size, all playing into one discharging 

 pipe, than to set one large ram. If one ram becomes dis- 

 abled, the others supply the demand. 



Should the fall and volume of one stream or spring not 

 supply enough water, and at the required elevation, and 

 there be other springs near by, set a ram in each, all meet- 

 ing in one discharging pipe. Their combined power will 

 increase the elevation and the quantity raised. 



The pipes can be so laid, and the ram so set, as to pro- 

 tect them from the frost during the winter. 



The fall of one spring or stream may be used to raise the 

 water of another and better spring or stream, whose own 

 fall is not sufficient. 



