302 New Process for Emetic Tartar. 



the preparation of Emetic Tartar, and more especially to such 

 processes as would admit of the common Hack sulpkuret of 

 andmGny being employed. 



Having succeeded in my endeavours to attain this object, and 

 received the most ample testimonials from my friends and many 

 other practical chemists, of the perfection, practicability, and, 

 saving in respect to expense, by following this process, I shall 

 on the present occasion, just mention in general terms the pre- 

 scription itself, and then leave any observations I may have to 

 offer on the subject, or on the labours of others who have pre- 

 ceded me, for another opportunity. 



Antimonium Tartarisatum. 



Two parts of black sulphuret of a7itimony in fine powder, and 

 one part oi nitrate of potash are to be mixed and added to tWd 

 parts of sulphuric acid, previously mixed with eight parts of wa- 

 ter and suffered to cool. By a due application of heat a proper 

 oxide of antimony will be formed, which when thoroughly washed 

 is to be boiled, while yet moist, with two parts of supertartrais 

 of potash and a proper quantity of water. The solution is then 

 to be filtrated, evaporated, and treated after the usual mannet 

 for crystallization. 



Although I succeeded by other methods, peculiarly my own, 

 to prepare this very important medicine, yet, upon the whole, 

 I am disposed to prefer the formula which I now lay before you, 

 more particularly as it is sanctioned with the decided approba- 

 tion of those whom 1 wished to serve and consult. 



I have here adopted the nomenclature of the College, which, 

 after all, is as correct and convenient as any other that has been 

 proposed for this article. I profess, indeed, to be an advoeate 

 for many of the arbitrary names, especially for such bodies as are 

 beyond a binary composition ; and, where the ingredients enter, 

 as in emetic tartar, alum, Rochelle salt, Sec. in definite propor- 

 tions, the rule is perfectly admissible ; I should propose, there- 

 fore, to retain both these preparations of tartar, at least under 

 their present titles, viz. antimonkim tartarisatum and soda tar- 

 tarisata. 



I remain, sir, 



Your obedient servant. 

 Long Acre, April 14, iai;>. Jos. HuME, 



LVI. On 



