Analyfts of the Air. 
cd in the water 3 the confequerxce of which 
was, that the new generated air continued 
in a more permanently elaftick ftate, very 
little of it lofing its elafticity, viz, not a- 
bove a 15 th or 18 th part, and that chiefly 
the firfl: 24. hours 3 after which the remain- 
der continued in a conftantly elaftick ftate 5 
excepting the air of tartar , which in 6 or 
8 days loft conftantly above one third of 
its elafticity $ after which the remainder was 
permanently elaftical. 
That the great quantities of air which arc 
thus obtained from thefe feveral fubftances 
by diftillation are true air, and not a mere 
flatulent vapour, I was afliired by the fol- 
lowing tryals , viz, I filled a large receiver 
which contained 540 cubick inches, with air 
of tartar i and when it was cool, I fufpend- 
ed the receiver while its mouth was invert- 
ed in water. Then upon lifting the mouth 
of the receiver out of water, I immedi- 
ately covered it by tying a piece of bladder 
over it. When I had found the exaft weight, 
I blew out all the air of tartar with a pair 
of bellows which had a long additional nofe 
that reached to the bottom of the receiver. 
And then tying the bladder on, I weighed 
it 
