AnaJyfts of the Att. 22$ 



N B. I poured hot water into the ciftern xx % 

 (Fig. 34.) to promote the ferment. 



A like quantity of filings of Iron, and pow- 

 dered Ne-ivcajlle Coal, did in three or four 

 days generate feven cubicle inches of air. I 

 could not perceive any fenfible warmth in 

 this mixture, as was in the mixture of Iron 

 and Brimfione. 



Powdered Brimfione and Newcajtle Coal 

 neither generated nor abforbed. 



Filings of Iron and Water abforbed three 

 or four cubick inches of air ; but they do not 

 abforb fo much, when immerfed deep in wa- 

 ter ; what they abforb isufually the firft three 

 or four days. 



Filings of Iron, and the above-mentioned 

 Walton Pyrites, in Exper. 70. abforbed in 

 four days a quantity of air nearly equal to 

 double their bulk. 



Copper Oar, and compound Aqua-fortis 9 

 neither generated nor abforbed air 3 but, mixed 

 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 white fub- 

 ftance. 



E x p E- 



