Analyfts of the Air. up 
A like quantity of filings of Iron, and 
powdered Newcajile Coaly did in 3 or 4 
days generate 7 cubick inches of air. I could 
not perceive any fenfiblc warmth in this 
mixture, as was in the mixture of Iron and 
Brimjione. 
Towdered Brimjione and Newcajile 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 wa- 
ter 5 what they abforb is ufuaily the firft 3 
or 4 days. 
Filings oi Irony 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 Gary and compound Aqua-Jortis^ 
neither generated nor abforbed air, but mix- 
ed with water it abforbed air. 
A quarter of a cubick inch of Tiny and 
double that quantity of compound Aqua- 
fortiSy generated two cubick inches of air- 
part of the Tin was diffolved into a very 
white fubftance. 
Ex- 
