17 S Amlyfis of the Air . 
Experiment LVIII. 
There was raifed from an ounce, or 457 
grains of Mujlard feed, 270 cubick inches 
of air, or 77 grains s which is fomething 
more than 4- part of the ounce weight. 
There was doubtlefs much more air in the 
feed 5 but it rofe in an unelaftick ftate, be- 
ing not difentangled from the Oil, which 
was in fuch plenty within the gun-barrel, 
that when I heated the whole barrel red hot, 
in order to burn it out, it flamed vigoroufly 
out at the mouth of the barrel. Oil alfo 
adhered to the infide of the barrel, in the 
diftillation of many of the other animal, 
vegetable, and mineral fubftances ; fo that 
the elaftick air which I mcafured in the re- 
ceiver, was not all the air contained in the 
feveral diftill’d fubftances ; fome remaining 
in the Oil, for there is unelaftick air in Oil, 
part being alfo reforbed by the fulphurcous 
fumes in the receiver. 
Experiment LIX. 
From half a cubick inch of Amber, or 
1 J5 grains, was raifed 155 cubick inches 
of air, or 3 8 grains, viz, ttt part of its 
weight. 
E XPE- 
