PHYSICAL AND LITERARY. 347 



to a chryftalline or vitriolic form by fub- 

 limation : When this corrofive mercury 

 is mixed with an equal weight of com- 

 mon antimony, and thefe rubbed toge- 

 ther, left to moiften in the air, and then 

 diftilled ; there happen fuch changes to 

 this mixture, as evidently (how a real pre- 

 cipitation of the quick-filver by the re* 

 guline part of the antimony ; for the a- 

 cid forfakes the quick-filver, and diffolves 

 the regulus, which makes the hutvmm an- 

 timonii *, and the quick-filver, freed f "om 

 the acid, is by the fire incorporated with 

 the fulphur of antimony into a black 

 powder like jEthiops mineralis .which, may 

 be fublimed into the ciimaharis antimonii, 

 Quick-filver diflblved in aqua fortis may 

 likeways be precipitated by another me- 

 tallic body, as zinc or bifmuth. 



V. Some bodies diffolved in their pro- 

 per menttrua may be precipitated thence 

 by feveral bodies of different quali- 

 ties. 



We meet with a great many inftances 

 in chemiftry to confirm this remark. I 



fhall 



