Analyfis of the Air. 1 99 



air, and in fome hours i z cubick 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- 

 fdxx, (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 

 a reforbing, as well as a generating ftate, viz. 

 by raifing the reforbing fumes, as will appear 



more hereafter. 



Half a cubick inch of Oyfterfhell, and a 

 cubick inch of oil of Vitriol, generated 3 2 

 cubick inches of air. 



Oyfterfhell, and 2 cubick inches of four 

 Rennet, of a Calve's ftomach, generated in 

 4 days 11 cubick inches. But Oyfterfhell, 

 with fome of the liquor of a Calves ftomach, 

 which had fed much upon hay, did not ge- 

 nerate air. It was the fame with Oyfterfhell 

 and Ox-gall, Urine and Spittle. 



Half a cubick inch of Oyfterfhell 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. 



O 4 Oyfteu 



I 



