3*6 COMBINATION OF MERCURY 



the nitrated mercury ; but this method is but 

 little profitable. On the other hand, there are 

 feveral, who taking Barchufen for their leader, 

 infpilTate the folution by heat, to perfect dry- 

 nefs, and afterwards rub the refiduum with an 

 equal portion of fult deprived of irs water of 

 cryftallifation. The authors of the Edinburgh 

 Pharmacopoeia have adopted this method. G. 

 Roth directs nitrated mercury to be triturated 

 with a fourth part of common fait, the refidu- 

 urn of the folution to be poured into a retort, 

 the fluid part of the mixture to be feparated by 

 diilillation, and what remains dry in the veflel 

 to be fublimed by a flrong fire, If a milder 

 preparation of corrofive mercury is defired, he 

 orders as much muriatic acid to be added, as 

 will equal the quantity of the nitrous feparated 

 by the diftillation *. The fame end may be ob- 

 tained, and not lefs certain, at a fmaller expence, 

 if a greater proportion of common fait ib added 

 at the beginning. 



vi. III. How far is tic Vitriolic Acid ferric c- 

 able in this Preparation. 



THIS acid may be employed in fuch a man- 

 ner, that any fubllance in which it is contain- 

 ed, as for example, the vitriol of Mars, can be 

 mixed \\ith mercury and common fait. In or- 

 der 



* Anlcilung zur Chcmic, 1717. 



