354 appendix. 
In order to try the Incomprcffiblenefs of 
Water, I filled the abovementioned Bomb, 
before it was burn:, with Pump Water, well 
purged of Air, which had fix 4 - i De- 
grees of Coldnefs above the freezing Point: 
Then placing it under the Cyder Prefs, I 
prert'ed fad; into irs Orifice a Plug, which 
had a Hole through it from Top to Bottom 
of about half an Inch Diameter 5 into which 
Hole I drove with a Hammer a ftrong tough 
•adien Pin, which was covered with Cement : 
When the Pin which was half an Inch Di- 
ameter was (b fa ft drove in that no Water 
could pafs by it, it then met with fo abfolute 
a Refiftance from the Water, that it feemed 
as if the lower end of the Pin had been drove 
againft a Stone or folid Iron ; fo that on ftrik- 
ing very hard Blows with the Hammer, the 
Pin was bruifed to pieces between the Ham- 
mer and the refifting Water. And the Di- 
ameter of the Bomb within fide, being fix: 
J- 7 Inches, the Area of its greateft Cir- 
cle is 35. 06 fquare Inches, then the in- 
ward Surface of the Bomb will be four times 
that Area, 132. 24 (quare Inches : This 
divided by o. 196" fquare 'Inch, the Area of 
rhe Bottom of the aflicn Pin, the Product 
^ 74 * 7 
