udnahjis of the Air. i \ 5 



arofe from a piece of heart of Oak, 216 



times ics bulk of air. Now 216 cubick 



inches of air, comprerTed into the fpace of 



one cubick inch, would, if it continued there 



in an elaftick ftate, prefs againft one fide of 



the cubick inch with an expanfive force equal 



to 3 ^93 pounds weight, fuppofing there were 



no other fubftance but air contained in it j 



and it would prefs againft the fix fides ot 



the cube, with a force equal to 20350 



pounds, a force furficient to rend the Oak 



with a vaft explofion: It is very reafonable 



therefore to conclude, that moft of thefe 



now a&ive particles of the new generated 



air, were in a fixed ftate in the Apple and 



Oak before they were roufed, and put into 



an aftive repelling ftate, by fermentation and 



fire. 



The weight of a cubick inch of Apple 

 being 191 grains, the weight of a cubick 

 inch of air } of a grain, forty-eight times, 

 that weight of air is nearly equal to the four- 

 teenth part of the weight of the Apple. 



And if to the air thus generated from a 

 veflel of any vegetable liquor by fermenta- 

 tion, we add the air that might afterwards 

 be obtained from it by heat or diftillation ; 

 and to that alfo the vaft quantity of air which 



P 4 by 



