92 MR. F. C. CALVERT ON THE SOLUBILITY OF 



TABLE No. 6. 



But this method of operating, namely, employing an excess 

 of precipitating agent, offers, as I have already said, great 

 inconveniences in consequence of an excess of precipitant 

 adhering to the sulphate of baryta, which necessitates num- 

 berless washings. To avoid prolonging this paper, I shall 

 state that the same difficulties present themselves when two 

 equivalents of sulphate of potash are employed for one equi- 

 valent of nitrate of barytes. 



INFLUENCE OF BOILING, UPON THE FORMATION OF 

 SULPHATE OF BAKYTA. 



TABLE No. 7. 



