that may be confequent to it , fome doubts may be fuggefted, 
which I have not now time to difcufle^yet I fuppofed, that at leaft 
fome difcoveries would by this way be made, though not of the 
true proportion between the Air and the Water , yet about two 
or three particulars, in due time to be taken notice of* 
To find Inftruments, which would any way accommodate our 
purpofCjproved a very difficult workf,fo that among other things, 
that we were fain to do,this was one, that to evince hoy/ little the 
Air, latitant in water, did appear to leflen the bulk of that water, 
if it were fufFered toflye away in an open Tube 5 we fuffered it 
to efcape in an exhaufted Receiver without any artifice to catch 
it 5 by which tryal the water did not part with any thing of its 
bulkjthacmade a diminution fenfibleto the eye. Wherefore we 
endeavoured to make this lofs vifible by fome other tryals , of 
which I can find but a few hafty memorials among my lofe En- 
tryes. 
A Chymical pipefealed at one end 5 and 36 inches (or fome- 
what left) in length, was fiU'd with water 5 and inverted into a 
glafs veffel , not two inches in diameter , and but 4 of an inch or 
little more in depth. Thele gla(Tes being conveyed into a fit Re- 
ceiver, and the Air being leifurely pumped out, and fomewhat 
flowly readmitted 5 the numerous bubbles , that had aicended 
during the operation, conftituted at the top an Aerial Aggre- 
gate, mounting to wanting about ico part of an inch. 
Thefe are two Prefeutly after, the Tube (by and by to be defcri- 
Experments, yj^^g filled again with the fame water, and in- 
verted , and the water being drawn down to the furfaceof the 
veflelled water, and the Air let in again , the water was impel- 
led up to the very tcp within a 10/^. and half a tenth of an inch. 
The Tube for meafuring the Air latitant in water was 43? in- 
ches above the furface of the fcagnant water; the Air collefted 
out of the bubbles at the top of the water , was the firft time J 
of an inch and fomewhat better ^ the fecond time we eftimated 
it but \ and rJ. The fir ft time the water in the pipe was made to 
fubfide full as low as the furfaceof the reftagnant water; the 
fecond time the loweft, we made it fubfide, ftemed to be 4 or 5 
inches above ihe furface of the water in the open veffel. 
Matter of fa3 thus recited would afford divers difficulties 
worthy to be eonfidered, which I have not leifure to difcufle, 
efpecially the Odd thing that happens to the Aerial particles of 
water: 
