Analyjis of the Air. 23 1 



I made the fame Experiment in a lefler 

 veflel z z a a y (Fig. 35.) which contained 

 but 594 cubick inches of air, in which 150 

 cubicle inches were abforbed; /. e. full \ 

 part of the whole air in the receiver : So 

 that tho' more air is abforbed by burning 

 Matches in large vefTels, where they burn 

 longeft, than in fmall ones, yet more air, 

 in proportion to the bulk of the vefTel, is 

 abforbed in fmall than in large vefTels: If a 

 frefli Match were lighted and put into this 

 infected air, tho' it would not burn i. part 

 of the time that the former Match burnt 

 in frefh untainted air, yet it would abforb 

 near as much air in that fhort time ; and it 

 was the fame with Candles. 



Experiment CIV. 



Equal quantities of filings of Iron and 

 Brimftone, when let fall on a hot Iron on 

 the pedeftal under the inverted glafs zz a a, 

 (Fig. 35.) did in burning abforb much air; 

 and it was the fame with Antimony and 

 Brimjlone : Whence 'tis probable, that VuU 

 cano's, whofe fewel confills chiefly of Brim- 

 fione, mix'd with feveral mineral and me- 

 talline fubftances, do not generate, but ra- 

 ther abforb air. 



CL4 We 



