[ 8i 5 1 
the Globe, when the Steam was condenfed, the Air 
let in, and all cold, it was as followeth; viz. 15 
Pounds 3 Ounces 2 Penny-weights Troy , the Weight 
without the Steam being 1 5 Pounds 3 Ounces 5 fo 
that the Weight of the Water condenfed from the 
Steam, or the Water converted into a ftrong elaftic 
Steam to fill the Space of this little Globe, is but 2 
Penny-weights, or 7^ of an Ounce Troy of Water, 
by which ~ of an Ounce Troy of Water fills, when 
converted into Steam, 925 cubical Inches of Space in 
a V effel, fo as to exclude nearly all the A ir. I repeated 
this Experiment feveral times, and found it nearly the 
fame 5 and by immerging the Cock in Water, and 
opening it again, as in the firft Experiment, I found 
the Weight of Water to be nearly as above, and to 
makeabout Void or Vacuum--, fo that 1 Ounce Troy 
of Water makes 9250 cube Inches of Steam, of equal 
Force with the like Number of Inches of Air 5 and 
with this Remark, that the Weight of the Steam is 
much lefs than the Weight of common Air ; for in 
this Globe I found the Air to weigh \ Ounce Avoir- 
dupois or 9 Penny- weight Troy ; and the Steam, which 
filled the fame Space, to weigh but 2 Penny-weight 
Troy , which is but little more than -fth Part, and 
fhews how very lmall the Particles of Water are when 
fo divided by the Force of Fire, and of what Force. 
From which I fhall conclude, that 1 cubic Inch of 
Water will difcharge or force out 4000 Inches of Air 
from a Veffel of that Content, which I have likewife 
proved by other Experiments in working the Fire- 
engine : Therefore I fhall make i: my Standard in 
fome future Calculations for Pra&ice, about that noble 
Machine. 
