C i8 7 3 
fage, and makes it fly off with a Report.' This Prin- 
ciple is univcrfally allowed : The Effeds of Gun- 
powder, of Volcano’s and Earthquakes, prove it : 
And to come nearer our Subject, unnealed Glafs 
breaks in the Air, and the Lacryma Batavica does 
as much upon breaking its fmall End. 
Whereas an Alkali is a fpongious Body filled with 
the igneous Matter, and an Acid are Points propor- 
tioned to thefe Pores ; thefe ought to be regarded as 
fo many Pegs or Pins, which enter into the Holes 
on the Surface of the Alkali, and fill them up exactly : 
Whereby the igneous Matter is imprifoned; and by 
the preceding Principle it burfls the alcaline Globule 
with Noife, and fcatters around the acid Pegs, in the 
fame manner as it burft the Glafs-Drop. 
A Mixture of an alkaline and acid Liquor being 
compofed of an infinite Number of fuch Particles 
that burft and broke to Pieces, the Liquor rfruft take 
up more room, or fwell. The Particles of Air 
therein contained, being tolled about by all thole 
iiitle Explolions, together with the neutral Liquors, 
which area Vehicle to the Salts, form the Scum or 
Froth ; and the igneous Matter, which gets out of 
the Alkali’s, and is agitated by the Shocks of all thefe 
Exploftons, produces He3t, drags with it the aqueous 
and other volatile Particles, which form the Steam. 
Yet there are cold Fermentations, becaufe then, 
either the Motion of the Particles of Fire, and their 
Fracas , is inconfiderable j or becaufe thefe Particles 
fly off eafily by a dired Morion. Moreover, at this 
Day that we have it in our Power to be convinced, 
that the Prufh or Stream of electric Matter is very 
A a 2 cold, 
