APPENDIX, 275 
6 , We may hence reafonably conclude that 
Waters and moft ocher Fluids contain in 
them both elaftic and unelaftic Particles 5 the 
claftic Particles readily expanding into Bubbles 
of a vifible Size, when the Weight of the in- 
cumbent Atmofphere is taken off by the Air 
Pump. But the Quantity of Air which arifes 
by this means, or by Heat, is but fmall in com- 
parifon of the Bulk of Water. Yet Monfieur 
Mariotte thought he had raifed by Heat, from 
a drop of Water, a Quantity of Air, equal to 
eight or ten times the Bulk of the Drop of 
Water. EJfay de la Nature de l*Air^ p, ii i. 
The Air which he raifed by Heat arofe doubt- 
lefs from the Oil which furrounded the Drop 
of Water, for Oil abounds with elaftic Air as I 
found by Experiment LXII. Vol, ijl, p, 179. 
In my Experiment LX VI. Vol. ifi, p, i8t. 
I gave the Water a (calding Heat, if the Heat 
had been greater the Water would have ex- 
panded, Co as to have either blown up the 
inverted Veffel, or to have been all expelled 
forcibly out of it, as would have been the 
Cafe with Monfieur Mariotte\ Drop of Water 
at the Bottom of his inverted Glafs Thimble, 
not only full of Oil, but alfo furrounded with 
it j if he had given it a greater Heat than I 
T % gave 
