u 
2 i o Ancdyfis- of the Air. 
honey at x, into the bottom of the glafs- 
tube z x , which was fealed at the top. I fet 
this tube in the iron cylinder n n y to fave 
it from breaking by the fwelling of the Peafe. 
The pot being filled with Peafe and water, 
I put a leathern collar between the mouth 
and lid of the pot, which were both ground 
even, and then prefied the lid hard down 
in a Cyder-prefs : The third day I opened 
the pot and found all the water imbibed by 
the Peafe 5 the Honey was forced up the 
glafs-tube by the Mercury to z y (for fo far 
the glafs was dawbed) by which means I 
found the preffurc had been equal to two 
atmofpheres and ^ ; and the diameter of the 
pot being 2 -|- | inches, its area was fix 
fquare inches, whence the dilating force of 
the air againft the lid of the pot was equal 
to 189 pounds. 
And that the expanfive force of new 
generated air is vaftly fuperior to the 
power with which it afted on the Mer- 
cury in thefe two Experiments is plain 
from the force with which fermenting 
Mud will burft the ftrongeft veflels > and 
from the vaft explofivc force with which 
the air generated from nitre in the firing 
of gun. powder, will burft afunder the 
» ftrongeft 
