1835.] Improvements in Science. 121 



deposit or ochre precipitates. The water yields in ^J^ 



parts, 



Chloride of potassium 0*3398 



Chloride of sodium 0*7937 



Soda combined with crenic acid . . . 0*6413 

 Ammonia combined partly with crenic acid 



and partly with carbonic acid . . . 0*8608 



Bicarbonate of lime ....... 9*0578 



Bicarbonate of magnesia 1*9103 



Bicarbonate of manganese 0*0307 



Bicarbonate of iron 6*6109 



Phosphate of alumina 0*0110 



Silica . 3*8960 



Crenic acid 5*2535 



29*4058 

 From the ochry deposit the new acids are obtained. It 

 consists of 



Crenate* of iron 90*54 



Carbonate of lime 3*54 



Phosphate of alumina with trace of magnesia 



and manganese 0*38 



Silica 5*54 



100*00 

 The temperature of the water is 44°* 6 F, and the gas 

 which is continually rising from the bottom of the well, 

 consists of 6 vols, of azote and 1 carbonic acid. 



Berzelius treated this deposit in the following manner : 

 the ochre was boiled with caustic potash, which produced 

 a brown solution, from which some ochre was deposited 

 after standing for some time. This precipitate was thrown 

 on a filter, the filtered solution boiled and iron deposited, 

 sulphuretted hydrogen being passed through the liquid, 

 the remaining iron in solution was separated. 



Crenic acid, (Kprjvr] a well) was obtained from the alka- 

 line solution by the following process *. The liquid was 

 supersaturated with acetic acid, and acetate of copper 

 added. If the precipitate was green, the acid was added 

 in greater quantity. Acetate of copper was then added as 

 long as a brown precipitate continued to fall. The crenate 

 of copper remained in solution in the acetic acid, and when 



