SALTS 



2 atoms oxalic acid 9 



1 atom potash . 6 



2 atoms water 2-25 



17-25 



. ig. Quadroxalate of potash. This salt, for 

 the first knowledge of which we are indebted to 

 Dr. Wollaston, crystallizes in octahedrons, the 

 apexes of which are generally deeply truncated. 

 It is composed of the following constituents : 



4 atoms oxalic acid 1 8 

 1 atom potash . 6 



7 atoms water . 7'875 



31-875 



I once obtained another oxalate of potash, 

 consisting of long prisms, which effloresced when 

 exposed to the air. I found the constituents of 

 this salt in its effloresced state 



3 atoms oxalic acid* 13 '5 

 1 atom potash . 6 



6 atoms water 6-75 



2() 25 



But, as this analysis was only made once, and 

 upon a small scale, I lay no great stress upon it. 

 I mention the circumstance to put others on 

 their guard respecting the existence of a fourth 



* The analysis gave 3Uh atoms, 



