Anvlyfis of the Air. 295 



in great abundance rufh forth from a fixt to 

 a repelling elaftick ftate ; it mufl needs be, 

 that theie particles did, in their fixt ftate, 

 ftrongly attract the acid fpirits, as well as the 

 fulphureous earthy parts of the Salt; for the 

 moft ftrongly repelling and elaftick particles 

 are obferv'd, in a fixt ftate, to be the moft 

 ftrongly attracting. 



But the watry acid, which, when fepa- 

 rated from Salt by the action of fire, makes 

 a very corrofive fuming fpirit, will not make 

 elaftick air, though its parts were put into a 

 brisk motion by fire in Experiment 75. And 

 the event was the fame with feveral other 

 volatile fubftances, as volatile Salt of Sal 

 Ammoniac > Camphire and Brandy-, which, 

 though diftilled over with a confiderable hear, 

 yet generated no elaftick air, in Experiment 

 52, 61, 66. Whence it is plain, the acid 

 vapours in the air only float in it like the 

 watry vapours ; and when ftrongly attra- 

 cted by the elaftick particles of the air, 

 they firmly adhere to them, and make 

 Salts. 



Thus in Experiment 73. we fee, by the 

 vaft quantity of air there is found in Tartar, 

 that tho' it contains the other principles of 

 vegetables, yet air, with feme volatile Salt, 



U 4 feems 



