Analyfis of the Air. 173 

 Experiment LIX. 



From half a cubick inch of Amber] Of 

 135 grains, was raifed 135 cubick inches 

 of air, or 38 grains, viz. $fe part of its 

 weight. 



Experiment LX. 



From 142 grains of dry Tobacco was raifed 

 153 cubick inches of air, which is little 

 lefs than j- of the whole weight of the To- 

 bacco 5 yet it was not all burnt, part being 

 out of the reach of the fire. 



Experiment LXL 



Camphire is a moft volatile fulphureous 

 fubftance, fublimed from the Rofin of a tree 

 in the Eajl-Indies. A dram of it, melted 

 into a clear liquor, at fome diftance from 

 the fire , and fublimed in the form of white 

 chryftals, a little above the liquor, it made 

 a very fmall expanfion, and neither gene- 

 rated nor abforbed air. The fame Mr. Boyle 

 found, when he burnt it in vacuo. Vol. 2. 



