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whereby it manifestly appeard that those liquors put
together tooke vp much lesse Room than when they were
separated.
Dr. Croon was of Opinion was of Opinion that the air
or water impregnated wth Salts become only heavyer vpon
the account that they were kept floting together and a
compound of water wth. a heauier body as salt, the com
pound taking vp as much Room as the same bodys did
apart, And there noe certaine obseruation yet to the con
trary of tht. in those bodys; the compound body not weighing
heauier than either of the compounding bodys.
mr. Hooke alledged there were some Instances whereby it appe[ar]
that bodys did really penetrate into the texture of each other
and did both together take vp Lese Room than they did before
that were mixt and soe made abody that was not only as
heauy as it ought to be supposing those bodys mixt together but
a body heauier than either of them, & consequently there must
be a penetration of the texture or Dimensions of each
other. He alledged also that there was the like penetrati
on in the oyle of vitrioll & water & also in Diuers other
bodys, which he could make Euident.
It was Desired that an Expt. of this kind might be shewn
at the next meeting. /

mor. Pappin produced his windgun charged wth. air which
he Designed by a pipe fastned to it to Discharge into
a large glasse filled wth. water & inuerted into a bucket
of water. but vpon making the Expt. the pipe being too
much pressed by the mouth of the Glasse was crack &
soe much of the air went not into the said Glasse & soe the
certainety of the Expt. could not be now Examined but desired
to be shewn the next Day.

But he chargd it againe and shot a plug through an
inch boord at      yards Distance.

Ref: CELL/RS/HF_370  © Centre for Editing Lives and Letters