THE MONTHLY BULLETIN. 



325 



The sulphuric acid should be kept in an earthenware or lead-lined 

 container and drawn off through a rubber siphon or outlet. An ordi- 

 nary keg or barrel with faucet will hold the water and a tight box is all 

 that is necessary for the cyanide. Dosage schedules, graduates, clamps, 

 rubber gloves, scales and sufficient light complete the outfit. (Pigs. 311, 

 312, 313.) 



Acid Container. — For ordinary work a three, five or ten-gallon 

 earthenware jar is sufficient. A lead lid for the top and a three fourths 

 inch iron pipe inserted through a hole in the side near the bottom with 



Fig. 312. — A splendid but expensive eliemical cart. (After The Braun Corporation.) 



a piece of pure rubber tubing six inches long and closed by an acid 

 clamp is a cheap and practical device. Lead-lined tanks are more 

 durable, but also much more expensive. 



Water Tank. — As there is three times as much water used as acid 

 the water tank must necessarily be larger. For a hand cart a pickle 

 keg is excellent, while a twenty-five or fifty-gallon barrel may be neces- 

 sary for a large wagon. An extension pipe and faucet furnish the 

 outlet which should be near that of the acid tank. 



Graduates. — The quantity of acid and water used depends entirely 

 upon the amount of cyanide required for a dose. For every ounce of 

 potassium cyanide one fluid ounce of sulphuric acid and three fluid 



