Analyfts of the Air. 199 



air, and in fome hours 12 cubicle inches 

 more, in all 29 inches. In nine days it had 

 flowly reforbed 21 cubick inches of air. The 

 ninth day I poured warm water into the vef- 

 fd x x, (Fig- 34-) and the following day, 

 when all was cool, I found that it had re- 

 forbed the remaining 8 cubick inches. Hence 

 we fee that warmth will fometimes promote 

 areforbing, as well as a generating ftate, viz. 

 by railing the reforbing fumes, as will appear 

 more hereafter. 



Half a cubick inch of Oyfterfiell, and a 

 cubick inch of oil of Vitriol, generated 3 2 

 cubick inches of air. 



Oyfterjhelly and 2 cubick inches of four 

 Rennet, of a Calve's ftomach, generated in 

 4 days 11 cubick inches. But OyflerjhelU 

 with fome of the liquor of a Calve s ftomach, 

 which had fed much upon hay, did not ge- 

 nerate air. It was the fame with Oyfier[hell 

 and Ox-gall, Urine and Spittle. 



Half a cubick inch of Oyfterjhell and Sevil 

 Orange juice generated the firft day 13 cu- 

 bick inches of air, and the following days 

 it reforbed that, and 3 or 4 more cubick 

 inches of air, and would fometimes generate 

 again. It was the fame with Limon juice. 



Q 4 Oyjlef. 



