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Anahfis of the Air. i&f 



inches diameter within fide, and five inches 

 deep I poured into it half an inch depth 

 of Mercury j then I put a little coloured 

 honey at x, into the bottom of the glafs- 

 tube z x t which was fealed at the top. I fct 

 this tube in the iron cylinder nn, to favc 

 it from breaking by the fwelling of the Peafc. 

 'The pot being filled with Peafeand water, 

 I put a leathern collar between the mouth 

 and lid of the pot, which were both ground 

 even, and then preiTcd the lid hard down 

 in a Cyder-prefs : The third day I opened 

 the pot and found all the water imbibed by 

 the Peafej the Honey was forced up the 

 glafs-tube by the Mercury to z, (for io far 

 the glafs was dawbed) by which means I 

 found the preflure had been equal to two 

 atmofphcres and J 5 and the diameter of the 

 pot being :-(-^ inches, its area was fix 

 fquare inches, whence the dilating force of 

 the air againft the lid of the pot was equal 

 to 189 pounds. 



And that the expanfivc force of new ge- 

 nerated air is vaftly fuperior to the power 

 with which it a&cd on the Mercury in thefe 

 two Experiments is plain from the force 

 with which fermenting Muft will burft the 

 1 ftronscft 



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