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mentioning another way of doing this It was orderd that both ways
should be prepared. (sympathy powder. Transporting. carps.)
December the 30. 1663 - It being thought on to make a standerd of cold it was
suggested by mr. Hooke that this might be conueniently done by obseruing
the Degrees of cold which freezeth Distilld water & by marking therevpon
the expansion of the Liquor in the weather glasse. (burning through ice)
mr. Hooke produced a Little engine to make the ascent & descent of
in glasse canes more decernable. twas orderd to prepare against next meeting
a tube wth. mercury and fitt this Instrument to it (expts. in P Ruperts powder
tryed wth. ferrules.). oyle serpent & sea salt sublimed produced curious figured salts.)
Poyson. Eels. ) The expt. of weighing the air in the compressing engine was againe made
and agreed very neer wth. the former. the difference only being half a dram wherein
the weight of the engine this Day exceeded that of the other. There being now also some
greater condensation in the Engine then before. The opr: was orderd to measure how
much the globe of the engine conteineth and also exactly to weigh the engine before
he compresseth the air in it and to haue the counterpoyse ready for the company
It being apprehended that some of the oyle in the vessell might spend it self at the
emission of the air, and somewt contribute to the diminution of the engines weight
after the air had been let out. (Red strekes.
Ian: 6. 1663/4. The expt. of shooting wth. the windgun applyd to the compressing Engine
was made, whereof the successe was that the condensation being made neer half in
the globe, the bullet shot at the Distance of about 20 yard made a considerable
dent in a dore enough to haue killd a man. It was orderd that this expt. should
be repeated at the next meeting, and a particular account of it brought in writing
by mr. Hooke. Dr. merret hauing found by expt. that water frozen though
exhausted hath store of Blebs & more then vnexhausted. mr Hooke mentiond that
he knew a way to reduce water into Ice wthout blebs. wherevpon he was desired
the next frosty weather to try this expt. and produce the effect of it before the Socie
As also to try whether such Ice shaped in to a Lens would serue for a burning glasse
mr. Hookes application of his Little engine to a tube wth for the rendring the
ascent & Discent of quicksiluer more discernable was referrd to the next meeting
The same was desired to prepare when the weather should serue that standerd
for cold which he proposed at the preceding meeting. Item to weigh a great Re
ceiuer both filld with air and Exhausted and to doe this both ways by weigh
ing it vnexhausted first, and then by exhausting it first And then by exhausting
it first and filling it with air againe. Item to try whether he can Raise
a thing and exhausted glasse bubble from the bottom of the Receiuer of the
condensing engine towards the top, by condensing the ambient air of the Bubble
(frost. cider. Pascalls equilibriums. west India grasse ropes. quantity of flys. swallows vnder Ice.
gunns sound wth east wind.) mr. Hooke was desired to take care that the wheel with
[In margin]p.30.   hollow cameras in it mouing wth. water or sand for a good while be made.
Ian: 13. 1663. [weather glass of aniseed & distilld water] mr. Hooke was orderd to haue
his tube for rendring the ascent & descent of more Discernable filld wth mer=
=cury against the next Day & to bring it vp in the Room of the meeting and the
same to giue an account in writing of the expt. made this day. of weighing a
great Receiuer exhausted of air & filled with air. Item to prepare the Expt.
of Raising a thin & exhausted glasse bubble from the bottom of the Receiuer of the com
pressing engine to the top by condensing the circumambient air. Item to Repeat
the expt. of shooting wth a gun applyd to the condensing engine which failed this Day

Ref: CELL/RS/HF_023  © Centre for Editing Lives and Letters