44 flDf t|>e ®ec|>an€cal ^tstne 



elevated bodies into exceeding fine 

 Flower, and much finer than Ptftles 

 and Mortars are wont to bring them 

 to. Bat that which I intend in this 

 Paragraph is not a thing fo obvious, 

 fince 'tis to obferve, that fometimes 

 even bodies fo fixt as not at all to a- 

 fcend in Sublimatiop, may yet be re- 

 duced by that operation into pow^ 

 ders extreamly fine. For exemplify- 

 ing of which* I (hall put you in mind; 

 that though Spagy rifts complain much 

 of the Difficulty of making a good 

 Calx of Gold, and of the imperfe? 

 &ion of the few ordinary proceffes 

 prescribed to make it, (which would 

 be more complained of, but that 

 Chymical Phyficians feldom attem£{ 

 to prepare ft,) yet we are informed 'By 

 triall, that by exa&ly grinding a thi£Jf; 

 amalgam 6f Gold and Mercury with^a 

 competent weight, (at leaft equaHo 

 Its own} of finely powdered Sulphur, 

 we may, b)rput ting the mixture toffr- 

 *blime in a cqnveniently (haped Glafr, 

 i>y degrees of fire obtain 'a Cinaber 

 that will leave behind it^ner Calk 



