192 



EXPERDIEXT STATION. 



[Tan. 



splieres of the slow process. The copper acetate soluhle results 

 are of uncertain value. Filtered liine water, with .12 per cent, 

 calcium oxide, contained insufficient lime to prevent solution 

 of the arsenic. Ammonia dissolves Paris green and the normal 

 by-products concomitant with its manufacture, such as copper 

 arsenite, arsenous oxide, sodium sulfate and sodium acetate ; the 

 residue, .11 per cent, in case of the slow process green, was 

 organic and other insoluble materials. 



To ascertain the solvent action of various substances in solu- 

 tion on Paris green, a series of tests were conducted with the 

 slow process sami)le. The green in stoppered flasks was treated 

 with water and with solutions of the respective compounds at the 

 rate of 1 gram to 1,000 cubic centimeters for twenty-four hours 

 at laboratory temperature, with occasional agitation during the 

 working day. 



Solubility Tests, Slow Process Green. 



About 5 gallons of gas used, water pres.sure. 



