Analyjis of the Air. 
173 
Experiment LIX. 
From half a cubick inch of Ambefy or 
135 grains, was raifed 135 cubick inches 
of air, or 3 8 grains, *viz. 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 LXI. 
Camphire is a moft volatile fulphureous 
fubftance, fublimed from the Rofin of a tree 
in the Eafi-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. 
p. 605. Ex- 
