the other hand, we fhall perceive a very violent agleatiori 
of fome of the parts of thefe mixtures : Many Vapours are 
^rhnled, the matter fwells, fends out many Bubbles sfnd 
F< nients with Noife. And in this manner I conceive 
that all thefe effeCts are produced. 
In the mixture which I made of Salts with Acid Liquors, 
the greateft part of the Liquor coagulating with a part of 
the Salts^ its motion was much abated in a little time 5 
but its parts not being able to coagulate, without flopping 
or weakning the current of the fubtil matter 5 this matter 
finding the paflages fhut up, takes its courfe^ by the Inter- 
ftices, which remained between the Coagulated Particles^ 
where the paflage was yet free ^ and as if glided away in 
.a quantity together, it caufeda very confiderable Agitation 
in the parts which it met with in its paflage. 'Tis this agi^> 
ration which caufes the Fermentation which we perceive r 
Tis this which raife.^ the Bubbles of Air .and the Smoke : 
Tis this which puffs up and fwells the matter^ with fo 
much the more Violence, as all the parts of the Liquor, 
being almoft half coagulated, do hinder the Motion and 
Agitation of thefe little Particles. Neverthelefs this A.gi- 
tation, how violent foever it may appear, is not con- 
fiderable enough to break the Coagulum intirely, which 
is formed in the Liquor, nor confeqaently to overcome 
the Cold, which caufes this Coagulation. All it can do, 
is to preferve yet fome kind of Fluidity. In fhort, the 
more thefe mixtures are difpos'd to coagulate, the more 
they eyxire the cold. This we may fee in the mixture of 
Sal Armoryac with 011 of Vitriol, in which the Coagii- 
kmi beconies fo ftrong, that at laPt, k forms above the 
Liquor a very thick Saline Cruft. In the mixture of o- 
ther Salts with weaker Acids, as in the mixture of Volatil 
Salts with Spirit of Vinegar, the CoaguUim can hardly 
be perceived 3 nor is the Cold fo confiderable as in the 
former. 
N n n n n n 
I 
