



n6 Analyfis of the Air. 



guifhed it. The expanfiori caufed by the 

 burning Nitre, was equal to more than two 

 quarts : When all was cool, there was near 

 80 cubicle inches of new generated air, which 

 arofe from a fmall quantity of detonized Ni- 

 tre 5 but the elafticity of this new air daily 

 decreafed, in the fame manner as Mr. Haukf- 

 bee obferved the air of fired Gunpowder to 

 do, 'Phyfico-mechanical Exper. p. 83. fo that 

 he found 19 of 20 parts occupied by this 

 air to be deferted in 1 8 days, and its fpace 

 filled by the afcending water j at which fta- 

 tion it relied, continuing there for 8 days 

 without alteration : And in like manner, I 

 found that a confidcrablc part of the air, 

 which was produced by fire in the diftil- 

 lation of fevcral fubftanccs, did gradually 

 lofe irs elafticity in a few days after the 

 diftillation was over ; but it was not fo 

 when 1 diftillcd air thro' water, as in Expe- 





■■ 





riment 77 



(Fig- 



38.) 

 ) 





Experiment OIL 



I placed on the fame pedeflal large Matches 

 made of linen rags dipped in melted Brim- 



fione : The capacity of the vcffcJ, (Fig. 3 5-) 



above 





. . 





* 









