n 6 Analyfts of the Air. 



fortis, generated 36 cubick inches of elaf- 

 tick sir, which was all reforbed the follow- 

 ing day. 



Experiment XCIII. 



Some time in February, a quarter of a 

 cubick inch of flings of Iron, and a cubick 

 inch of compound Aquafortis, without any 

 water, did in 4 daysabforb 27 cubick inches 

 of air. Ir having ceafed to abforb, I poured 

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

 could renew the ferment. The efFe&of this 

 was, that it generated 3 or 4 cubick inches 

 of air, which continued in that ftate for 

 fome days, and was then again reforbed. 



I repeated the fame Experiment in warm 

 weather in April, when it more briskly ab- 

 forbed 12 cubick inches in an hour. 



Experiment XCIV. 



March 1 2th, ^ of a cubick inch of filings 

 of Iron, with a cubick inch of compound 

 Aquafortis, and an equal quantity of water, 

 for the firfl: half hour abforbed 5 or 6 cubick 

 inches of air 5 but in an hour more it had 



emitted 



