350 APPENDIX. 
1^, As to the Viol and mercurial Gage 
they were broken into many Pieces, and all 
the Pieces of the Tube or Gage were dawb- 
ed within fide with Turpentine and Particles 
of Mercury, to the very Top of the Tube, 
which was frozen at each End into the Shell 
of Ice. As the Water in the middle of the 
Bomb was not frozen, this Experiment might 
cafily be repeated without Danger of break- 
ing the Gage, or Viol, 'viz* by fixing them 
to a fmall Stick, of equal Length with the 
Diameter of the Bomb, by which means 
they would be fuftained within the Limits 
of the unfrozen Water. 
30. We may from this Experiment make 
fome Eftimate of the Force which was re- 
quifite to burft the Bomb, and confcquently 
of the Degree of Compreflure which the Air 
in the Gage fuftained, viz. The Diameter of 
the Bomb within fide was 64 -'- Inches, the 
Thicknefs of its Subftance at its Orifice i. 1 
Inch, its Thicknefs at the Bottom was i. p 
Inch. Now fuppofing the Subftance of the 
Bomb to be all over of the fame Thicknefs 
with its thinneft part, viz. i. 2 Inch 5 then 
the Area of the Ringlet which cuts that 
Subftance tranfverfely in its biggeft Circle, 
will 
