ii6 



Analjfis of the Air. 



\ 



fort is, generated 36 cubicle inches of elaf- 

 tick air, which was all rcforbed the follow- 



ing day. 



Experiment XCIII. 



Some time in February, a quarter of a 

 cubick inch of filings of Iron, and a cubick 

 inch of compound Aquafortis, without any 

 water, did in 4 daysabforb 27 cubick inches 

 of air. It having ceafed to abforb, I poured 

 hot water into the velTel x x, to try if I 

 could renew the ferment. The effect of this 

 was, that it generated 3 or 4 cubick inches 

 of air, which continued in that ftate for 

 f'ome days, and was then again rcforbed. 



I repeated the fame Experiment in warm 

 weather in April, when it more briskly ab- 

 sorbed 1 2 cubick inches in an hour. 



Experiment XCIV. 



March 12 th, * of a cubick inch of filings 



of Iron, with a cubick inch of compound 



Aquafortis, and an equal quantity of water, 



for the firft half hour abforbed 5 or 6 cubick 



inches of air 5 but in an hour more it had 



emitted 





iOtia 





l 



