276 APPENDIX. 
gave the Water in my inverted Vcffel. 
7. That the Air which is raifed and feparat*' 
ed from Fluids takes up a much greater Space, 
and is confequently more expanded than while 
in the Fluid, I found by the following Expe- 
riment, *viz, I cemented to the Mouth of a 
half Pint Viol, a Glafs Tube of three Inches 
Length, and half an Inch Diameter in bore : 
Then filling the Viol full of fmall Beer, I put 
it in a Glafs Veffel which was ten Inches deep, 
filling the Vefiel v/ith Water ; I then placed 
over the Mouth of the Viol a fmall inverted 
Glafs Tunnel, made of the Neck of a Flo- 
rence Flask, its fmall Orifice being flopped 
with a Cork, which Cork refled on the Mouth 
of the Viol. Then by reclining the deep 
Glafs Velfel, all the Air bubbled out from un- 
der the Bottom of the Viol, and from under 
the inverted T unnel. Then placing the whole 
under an Air Pump Receiver, I exhaufted gra- 
dually fo much Air, as to caufe Bubbles to 
rife out of the Beer into the Glafs Tunnel, 
fufficient to occupy a Space nearly equal to a 
cubic Inch. Then letting in the fmall Qiian- 
tity of Air which had been exhaufted out of 
the Receiver, I found the Qiiantity of Air in 
the inverted Tunnel to be many times great- 
er 
