Analyfts of the Air. %\$ 



A like quantity of filings of Iron-, and 

 "powdered Newcafile Coal, did in 3 or 4 

 days generate 7 cubick inches of air. I could 

 not perceive any fenfible warmth in this 

 mixture, as was in the mixture of Iron and 

 Brimftone. 



Towdered Brimftone and Newcafile Coal 

 neither generated nor abforbed. 



Filings of Iron and Water abforbed 3 or 

 4 cubick inches of air, but they do not ab- 

 forb fo much when immerfed deep in wai- 

 ter ; what they abforb is ufually the firit 3 

 or 4 days. 



Filings of Iron, and the above mentioned 

 Walton Tyrites in Exper. 70. abforbed in 4 

 days a quantity of air nearly equal to dou^ 

 Ble their bulk. 



Copper Oar, and compound Aqua-fortis, 

 neither generated nor abforbed air, but mix- 

 ed with water it abforbed air. 



A quarter of a cubick inch of Tin, and 

 double that quantity of compound Aqua- 

 fortis, generated two cubick inches of air $ 

 part of the Tin was diffolved into a very 

 whitp iubftance. 



8fr 



