HOUGH 1BLE EKGIHEEJL (4$ 



to pick up and go on working again 



automatically after the v is been broken. 



ii pump will draw water, ther- 

 34 feet illy the limit is reached at abor 



The pressure of the atmosphere is about 

 pounds per > ikes 2.3 feet of water to 



produce a pressure of one pound, or in other words, a 

 column of water one inch square and 2.3 feet high 

 weigh just one pound. The 14.7 pounds atmospheric 

 pressure, therefore, will support a column of water 2.3 

 >r 33.81 feet high. These are theoretical 

 figures. In the case of a pump there is a slight leakage of 

 nir by the piston, then there is the impossibility of secur- 

 ing a per -mini and the friction and weight of the 

 valve to overcome. All of these things taken together 

 make it impossible to lift water with a suction pump moro 

 or 26 feet as stated above. The lifting capacity 

 of an injector is due to atmospheric pressure just the 



as in the case of a pump. 



The jet of steam when it first passes into the in- 

 jector goes out through the overflow and carries with 

 r in the suction hose. Atmospheric pressure acting 

 on the surface of the water presses the water up into the 

 injector, where it is acted upon by the steam. The steam 

 a the \v -h vclcv it the same time 



The combined stream of steam and 

 water rr a higher velocity than the water would 



