352 APPENDIX. 
mon Avoirdupoife Weight as ^3 to 100, 
will amount to ^$ 66^0 Pounds Avoirdupoife, 
equal to the Force requifite to burft the 
Bomb in halves. And the Area of the 
greateft Ckcle within the Bomb being equal 
to 33. 16 fquare Inches, and fifteen Pounds 
five Ounces being nearly equal to the Weight 
of the Atmofphere on a fquare Inch, thefe 
multiplied into 33. 16 (quare Inches give 
^j[o4. 3 Pounds, the Weight of the Atmo- 
fphere on a Circle of that Area *, by which 
dividing the above Number 9 ^ 66^0 the Pro- 
duft 1837, gives the Number of Atmo- 
fpheres, which preffed on the Air in the 
Gage ; which Air muft therefore be com- 
preffed into Space: 
Which is equal to the Weight of a Column 
of Sea Water fo many times thirty three Feet 
high, or 606 ^^ Feet or eleven Miles. And 
the length of the Cavity of the Gage being 
4. 06 Inches, if the Air in it was condenfed, 
in Proportion to the incumbent Weight, it 
was then comprefled into o. 0012 part of 
the Length of the Tube, or nearly ^^th 
part of an Inch ; too fmall a Space to be 
(een. 
31. And 
