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180 . 



Analyfis of the Air. 



air from the ftrongly adhering particles, 

 than is found requifite to raife the air from 

 nitre. Whence the air of Sal Tartar muft 

 neceflariiy thereby acquire a greater elaftick 

 force, and make a more violent explofion, 

 than that of nitre. And from the fame rea- 

 fon it is, that Aurum Fulminans gives a 

 louder explofion than Tulvis Fulminans. 

 The fcoria of this operation did not run per 

 deliauium, a proof that all the SalTartar was 



diftilled over. 



From the little quantity of air which is 

 obtained by the diftillation of fea-falt in Ex- 

 ' pcriment 71. in comparifon of what arifes 

 from nitre and SalTartar, we feethercafon 

 why it will not go off with an explofive 

 force, like thofc when fired. And at the 

 fame time we may hence obferve, that the 

 air included in nitre and SalTartar, bears a 

 confidcrablepart in their explofion. For fea- 

 falt contains an acid fpirit as well as nitre j 

 and yet that without a greater proportion 

 of air does not qualify it for explofion, tho' 

 mixed like nitre in the compofition of gun- 

 powder, with fulphur and charcoal. 



Mr. Boyle found that Aquafortis pour- 

 ed on a ftrong folution of fait of tartar did 



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