Analyfis of the Air. loy 



inches diameter within fide, and five inches 

 deep. I poured into it half an inch depth 

 of Mercury 5 then I put a little coloured 

 honey at x, into the bottom of the glafs- 

 tube z x, which was fealed at the top. I fet 

 this tube in the iron cylinder n n, to favc 

 it frombreakingbythefwellingof the Peafe. 

 The pot being filled with Peafe and water, 

 I put a leathern collar between the mouth 

 and lid of the pot, which were both ground 

 even, and then preffed the lid hard down 

 in a Cyder-prefs : The third day I opened 

 the pot and found all the water imbibed by 

 the Peafe 3 the Honey was forced up the 

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

 the glafs was dawbed) by which means I 

 found the prefiure had been equal to two 

 atmofpheres and \ ; and the diameter of the 

 pot being 2-j-j 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 expanfive force of new ge- 

 nerated air is vaftly fuperior to the power 

 with which it acted on the Mercury in thefe 

 two Experiments is plain from the force 

 with which fermenting Muft will burft the 

 1 ftrcngtft 



