Anahjfis of the Air\ 225 



(Fig. 35.) increafed in weight by imbibing 

 the floating moifture of the air : But they 

 abforbed no elaftick air. It was the fame with 

 the remaining lixivious Salt of a diftillation 

 of Nitre. 



But 4 or 5 cubick inches of powdered 

 frefh Cynder of Newcaftle Coal did in feven 

 days abforb 5 cubick inches of elaftick air, 1 

 And 1 3 cubick inches of air were in 5 days 

 abforbed by Tulvis Urens, a powder which 

 immediately kindles into a live Cole^ upon 

 being expofed to the open air. 



Experiment CIL 



What effect burning and flaming bodies, 

 and the refpiration of Animals have on the 

 air, we fhall fee in the following Experi- 

 ments, viz. 



I fix'd upon the pedeftal under the inver- 

 ted glafs z z a a (Fig, 35. ) a piece of 

 Brown Taper, which had been dipped in a 

 folution of Nitre, and then well dryed j I 

 fet fire to the Paper by means of a bur- 

 ning glafs : The Nitre detonized and burnt 

 briskly for fome time, till the glafs zzaa 

 was very full of thick fumes 5 which extin- 

 ct guifhed 



