22 ©f t^e ^ec^antcai ©n'fime 



of a body comes to be totally aba- 

 ted^ and confequently the body to 

 be fixt. 



CHAP. IV. 



f\ N D firft we find, that a fixt ad- 

 Jf\ ditament., if its parts be conve- 

 niently fhaped, may eafily give a 

 degree of fixity to a very volatile 

 body. Thus Spirit ofNitre> that will 

 of it felf eafily enough fly away in 

 the Air^ having its faline particles af- 

 fociated with thofe of fixt Nitre, or 

 fait of Tartar will with the Alkaly 

 cofnpofe a fait of a Nitrous nature, 

 which will endure to be melted in a 

 Crucible without being deprived 

 even of its Spirits. And I have found, 

 that the fpirits of Nitre^ that abound 

 in Aqua forth\ being concoagulated 

 with the Silver they corrode, though 

 one would not exped that fuch fub- 

 tile Corpufcles fhould ftick fall to fo 

 compaft and folid a body as Silver* 

 yet Cryftalls, produced by their 

 : Goali- 



