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 j the great degree of Fire 
with which Sal Tartar is made, rendering 
the cohefion 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 Tuhis 
FulminanSy 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 ftate than thofe of Nitre^ they are there- 
fore thrown off with a greater repulfive 
force, by the united adion and re-'adion of 
all thofe ingredients armed each with its 
acid Spirit. 
Experiment CXV III. 
Which acid Spirits confifting 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. 
