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(mr. Boyle a tract of Iseland writ by Monr: Peyrere.) D Goddard . calcining Antimony.)
(Operator powder out of steel Case.) Taylor about Rattlesnakes) Boyle about Tunbridge
water) Ships for Guinny. Expts orderd. 1 measuring descending. 2 finding musicall notes. 3 of
Breaking firr & elm. 4 of measuring refractions by mr Hookes new Instrument 5 firing
Gunpowder & fulminating powder. 6 to see if these powders flame when fired
Iuly. 27. 1664. Sr. Philiberto vernattys present & answer to querys read. East India company
to be solicited. A tree in England like arbor cristis. yeugh tree leaues poysonous to Dogs &
horses. A true cubick inch of water. tryalls wth Prince Ruperts powder. also wth Puluis
fuliminans. query Expansion of Gunpowders The Expt. wth the monochord prosecuted & one
wire being extended wth. 5ll. weight and the other tuned vnison to it then the same string
was extended wth. 20ll. weight was Iust an octaue higher which shews that the
weight is in a Duplicate proportion to the sound or Vibration. this to be further
prosecuted. also of the Celerity of falling bodys, also tht fulm. & pulv: fulm: be fired in
a dark corner to see if they will flame. also the Instrument for measuring Refrac
tions.
August. 3. 1664. The Expt. of the velocity of Descending Bodys was tryd wth 3
Leaden Balls of Diffiring bignesses. the Diameter of one being 1 73 inches
of the second 1 37 inches. the 3d. 0 99. the Length of the Descent 6i foot the
time 3 vibrations of half second and 15 or 16 minutes. soe that the Difference
betwixt them was but one. mr. Hooke was appointed to find some. Convenient
place in Westminster or St. Paules for the Prosecution of these Experimts
in a place free from the wind & to desire such persons of the society for his as
sistance as he could Gett. The expt. wth the monochord was prosecuted two -
strings being tuned vnisons, one of them was stopt at one third & the lower
end of it gaue a fifth and the shorter an eighth higher than the Longer. then
one of the strings was soe stopt as to make it a note higher then the whole and
the proportion of the shorter to the whole was found Lesse than 9 to 10. then the
string was stopd a 3d higher and the proportion was found as 3 to 4. this was
estimated soe by the Ear. Birkenshaw to be present.
The Expt. of Breaking fir & elm was made and a peice of fir of one inch diameter
at 6 inches distance from the weight was wth the graine transverse broken horizon
tally wth. 15ll. vertically wth 23ll. Elme of /like/ biggnesse & distance, wth the graine transverse
broken horizontally wth. 32ll. at most vertically wth 33ll. The operr. gaue an account
that the puluis fulm: kept in the steel case a whole week did as soon as it had any
vent, by making the Screw a little easy giue a strong blast and smoke. fresh powd
being taken & put vpon an Iron plate ouer some coles fired after a Little while
wth. a very smart Report. this Expt. wth Pulu: fulm: to be repeated next Day.
(cows ball) minerall from Germany) query for Guinea) Horrox letters.)-
properties of monochord. Refraction. Descent of Graue B. Pulv: fulm.
Augu: 10. 1664. stones from Beale. for plastick virtue) (But seuerall of the company were
of opinion that these shells had been filled wth clay or mud. wch from them Receiued the Impres
sion of their & was in Length of time hardned into a stony substances seeing that in
some of these stones the shells were yet manifestly Distinct from the petrifyd earth though in some
the earth & shells had been conuerted into stones together (Discourse Read) Berkinshaw. tund strings
by his ears. he could not distinguish difference of tones in . . . thirds fourths & tones by mouing
the Bridge half an inch. (the box was about 5 foot Long as I remember). monochord to be examined
by a virginall exactly tund. boyling oyle in warm water will take out salt and soe is fitt for
keeping Iron from Rust. Expts. for next day. Refraction. Heauy bodys. flaming of & Pulu fulmin
mr. Hooke was Desired to bring in a List of Expts. to be made before the Society on their
meeting Days -

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