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oyle of turpentine and other Liquors. And mr Hooke was orderd to Giue an account of his
anatomicall Expt.
Nouem. 23. 1664. (2 letters from Iseland. of the effects of cold. Icy mountains, hot springs & husbandry.
also more particulars of Icy mountaines. Celestiall bodys. tides, winds, magnet variations, vegetable . humour
of natiues) beer of Barley Bread.) beer of potatoes) there was made an Expt. of oyle of turpentine
and Common oyle. and it was found that the former at an angle of inclination of 30 degree
had an agle of Refraction of 46o. 9'. and the Later at the same angle of Inclination an angle
of Refraction of 46o. 29'. (From Zulichem . Letter S R moray proposd that the whole tube might
be filld wth. the liquor whose Refraction is to be examined and the glasse put at the Lower
end. & sett exactly at Right angles to the tube. the same suggested that these expt. might be
made wth seuerall quantitys of the Liquors & wth vessells of seuerall sises conteining them.
The same proposed a way to know certainly the refraction of celestiall bodys vizt that since
watches are Reduced to that exactnesse that they doe not faile a minute in 3 or 4 months
to shew the suns mean motion that for the perfect knowledg of the Refraction of the
Sun Moon & other starrs there needs noe more for the sun but a sun Dyall by which
one may know the minutes & seconds of an hower which being compared with those
of such an exact watch, and the Difference Reduced to Degrees and minutes shew
the Refraction precise. mr. Hook mentiond an Instrument for measuring the Re
fraction which Celestiall bodys suffer in the Air. He was orderd to bring in a Scheme
of it at the next meeting, as also to take care that his Quadrant be made ready for
Discouering a second minute by a sun Diall or the starrs. (Zulichems proposall about vni
versall measure. vizt. The distance of the center of the bullet from the point of suspension
as the first terme, the semidiameter of the Bullet, the 2d term. added to 2/5 of the 3d propor
tionall terme equalls the Distance of the center of vibration from the point of suspensi
on, to apply which to a vniuersall measure. take a bullet of any metall & hang it
by a string which make of that length that it vibrates seconds or half seconds, and when
you haue the exact measure of time according to this Rule you haue the certaine length of the
center of vibration which is the vniuersall measure. this Length the Author findes
to be 9 1/2 Rhinland Inches, the vibrations being half second, orderd that against next Day
there be prepared two pendulums vibrating half seconds wth balls hauing Diameters
one considerably bigger then the other. & that they be adjusted before to see whether
the proportion holdeth. order orderd that the Expts of Refractions be continued according
to the Lists brought in by mr. Hooke.
mr. Hooke was by Dr. wilkins proposed Curator by office to the Society & the Prest. ac
quainted the company that the Councell had found it necessary to haue a curator
and that they would allow him pro tempore 30ll. a year. the Present Revenue
of the Society not being well able to bear a greater allowance and that mr
Hooke was contented wth. this summe for the present Sr. Iohn Cutler hauing setled
vpon him During Life 50ll. p'annum vpon the account of Reading Lectures of Ex
perimentall philosophy which addition had made him willing to accept pro tempore
of 30ll a year from the Society for performing the office of a curator. The Society
voted that he should be dispensed wth. as to the visitation of the Councell.
mr. Hooke mentiond a way of finding a 2d minute by a telescope he was orderd
to putt this into practise. The same was also orderd to make an other Dissection
of a viper & to doe it in the presence of Dr. Ent and some other physitions
being of the Society, for the same purpose he had Lately done it whereof he brought in
an account in writing which was read & orderd to be Registred.
Nouemb. 30. 1664. Election day. french treatise of curing tendons cut transverly -
Decemb: 7. 1664. the Expt. for verifying Monr. Zulichems Rule concerning the vniversall measure
was made twice, there being taken a very small bullet wth a line of the Length of 15 3/10 and two wooden
Balls one of 3 and the other of 6 inches, which being adjusted with the former line, it was found
in the first tryall, that the Line of the Ball of 3 inches Diameter was 13 1/2 long which added to the

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