200 



EXPERIMENT STATION, 



[Jan. 



Solubility. 



The calcium acetate soluble appeared to have no particular 



significance, and the test was eventually droi)ped. The water 



soluble results are only approximate, as slight variations in 



temperature or agitation caused marked differences. Solubility 



is apparently not a result of hydrolysis, as proportionally the 



lime passed into solution almost as rapidly as the arsenic. If 



hydrolysis played any part it would seem to be inappreciable. 



Lime arsenite was nearly insoluble in lime water. In order to 



secure additional data relative to the solubility of lime arsenite, 



1 gram of sample C3, after drying, was subjected to the action 



of various solvents for twenty-four hours in stoppered flasks 



with occasional agitation, the results of which are stated 



below : — 



Solubility Tests, Sample Cs Dried. 



Solvent. 



Amount of 



Solvent 



in a Liter 



of Water 



(Grams). 



Soluble 



As20s 



(Percent.). 



Lime. 



Remarks. 



Distilled water, . 



Water saturated with CO2, 

 Ammonium hydroxide (concentrated). 

 Ammonium carbonate, 

 Ammonium chloride. 

 Ammonium nitnstc, . . 

 Ammonium nitrite solution. 

 Ammonium sulfate, .... 

 Sodium carbonate (anhydrous). 

 Sodium bicarbonate. 

 Sodium chloride, .... 

 Sodium nitrate, .... 



Sodium nitrite, .... 



Sodium sulfate (anhydrous), . 

 Boiling water, 1 hour. 



38.45 

 62.22 

 36.66 

 64.36 

 53.40 

 51.97 

 43.00 

 .52 71 

 59 32 

 62.19 

 41.20 

 40.53 

 40.72 

 41.08 

 58.63 



Present. 

 Present. 

 Present. 



Trace. 

 Present. 

 Present. 

 Present. 

 Present. 



None. 



None. 

 Present. 

 Present. 

 Present. 

 Present. 



Much. 



' Contained .39 per cent, of ferric and aluminum oxides and .08 percent, of magnesium oxide. 

 » About 5 gallons of gas used, water pressure. 



