Analyfis of the Air. 217 



eniitted that quantity of air ; and in two 

 hours more it again reforbed what had been 

 juft before emitted. The day following it 

 continued abforbing, in all 12 cubick in- 

 ches : And then remained ftationary for 15 

 or 20 hours. The third day it had again re- 

 mitted or generated 3 or 4 cubick inches 

 of air, and thence continued ftationary for 

 five or fix days. 



A like quantity of filings of lron> and oil 

 of VitrioU made no fenfible ferment, and 

 generated a very little air j but upon pouring 

 in an equal quantity of water, it generated 

 in 21 days 43 cubick inches of air j and in 

 3 or 4 days more it reforbed 3 cubick in- 

 ches of air 5 when the weather turned warmer 

 it was generated again, which was again re- 

 forbed when it grew cool. 



Jth Of a cubick inch of filings of Iron, 

 and a cubick inch of oil of Vitriol, with 

 three times its quantity of Water, generated 

 108 cubick inches of air. 



Filings of Iron, with fprit of Nitre, 

 either with an equal quantity of water, or 

 without water, abforbed air, but moft with- 

 out water, 



JthOf 



