

I 









278 



Analyfis of the Air. 



ment, compared with Experiment 72, it is 

 found, that a much more intenfe degree of 

 heat was required to extricate the elaftick 

 air from Sal Tartar, the more fix'd body, 

 than from Nitre-, the great degree of Fire 

 with which Sal Tartar is made, rendering 

 the cohcfion of its parts more firm : For it is 

 well known that fire, inftead of difuniting, 

 does in many cafes infeparably unite the parts 

 of bodies : And hence it is that Tulvis 

 Fulminans, which is a mixture of SalTartar, 

 Nitre and fulphur, gives a greater explofion 

 than Gun-powder: Becaufe the particles of 

 the Sal Tartar, cohering more firmly in a 

 fix'd ft ate than thofe of Nitre > they are there- 

 fore thrown off with a greater repulfive 

 force, by the united action and re-attion of 

 all thofe ingredients armed each with its 

 acid Spirit. 



Experiment CXVIIL 



Which acid Spirits confiding of a volatile 

 acid Salt diluted in phlegm do contribute 

 much to the force of explofion ; for when heat- 

 ed to a certain degree, they make a great ex- 

 plofion, like water heated to the fame degree, 



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