( ) 
time, as it had been fince the Experiment was made, 
there might not be fuch an Evaporation of the parts of 
the Fluid, as to become equal in bulk to the quantity 
of the difpoffefs fpace $ and whether it was fo or 
not, I gave my felf the fatisfa&ion after the following 
manner. Into an upright Glafs, that would hold about 
3 Ounces of Water, I put a quantity of the fame Fluid 
equal to 885 Grains: Into another Glafs of the fame 
form, but fmalier, I put a quantity of Oil of Vitriol e- 
qual to 456Grains$ which, with tbeir refpeftive Glaffes, 
I weighed altogether in a nice ballance : After which, 
1 put the Oil of Vitriol, Glafs and all, into that which 
held the Water ; where immediately a very great Ebul- 
lition began, and the Glafs that contained them became 
fo hot, as to be but juft endured in the Hand. I found 
in two Minutes time it had loft of its weight about two 
Grains: And at the end of an Hour, or better, it had 
decreafed in all but 6 Grains and a half , by that time 
the Conflict was wholly ceas’d, it being then nearly re- 
duced to the Temperature of the outward Air. After 
that,. I weighed them at feveral times, but found them 
in the fame State, as to their weight, as laft mentioned. 
I continued them in the Scale till the next Morning, 
when I likewife could diftinguifh no manner of altera- 
tion in the fore mention’d weight. From whence it 
plainly appears, that the decreafe of bulk upon the mix- 
ing of thefe Liquors, does not proceed wholly from an 
Evaporation of their Parts 5 fince by the laft Experiment, 
the Evaporation continued no longer than the Fermen- 
tation lafted ; but the decreafe of the bulk of the Bodies, 
feems not to be performed all at once, or in fo fhort a 
time, as may be taken notice of in the firft Experi- 
ment. 
VII. An 
