2 7 8 Analjfis of the Air. 



merit, 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 fiYd body, 

 than from Nitre*, the great degree of Pire 

 with which Sal Tartar is made, rendering 

 the cohefion of its parts more firm: lor it is 

 well known that fire, inflead of difuniting, 

 does in many cafes infeparably unite the parts 

 of bodies : And hence it is that Tuhis 

 Fulminant, which is a mixture of SalTartar, 

 Nitre and fulphur, gives a greater explofion 

 than Gun-powder : Becaule the particles of 

 the Sal Tartar, cohering more firmly in a 

 fix'd date than thofe o£Nitre> they are there- 

 fore thrown off with a greater repulfive 

 force, by the united action and re-a£Hon of 

 all thofe ingredients armed each with its 

 acid Spirit. 



Experiment CXVIII. 



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, 



as 



