98 



The Phosphates of America. 



best adapted to the purpose, is shown in the illustration, and is 

 made of thick cast-iron, shaped something like an English soda- 

 water bottle. 



It is placed in position upon a somewhat lower level than the 

 bottom tanks, requires no lead lining, and is closed at one end by 

 a man-hole door of wrought-iron. On its top side are provided 

 three flanged openings fitted with a corresponding number of pipes 



ACID-SIPHON, OR "EGG." 



one for the blower, one for the acid charger, and the third, which 

 extends right through to a hollowed-out space in the under side, for 

 delivery. Valves and cushions are fitted to the pipes leading from 

 the tanks to the main passage into the egg, such main being also 

 provided with a perfect-fitting strong screw-valve and a long rod. 

 Near the bottom is a guide, the upper part of which traverses a 

 very strong wooden frame in which is fixed the screw-worm, and 

 having upon its top a small hand-wheel. When ready to charge, this 

 valve is turned up and the cistern plug removed. When the egg 



