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which seemd to shew how the Loadstone conformes it self to the earth. The Business of chariots
being againe spoken of the Pt. Related, that as mr Hooks chariot was now contriued it went better then
before & free from Iolting (Blunts chariot) Iapan Copper.)
May. 16. 1666. A paper of mr Philips was brought in by mr Hooke concerning the variation of the
magnetick needle as they had been obserued in 2 east india voyages. (wallis Letter about effects of thunder
(wallis hypothesis of the flux & Reflux of the Sea) objections) There was made an Expt. to see whether the
magnet did attract iron at as great a Distance in the water as in air, and it was found
that It did very near. for the Loadstone & Iron being distant a little lesse then half an inch in both
mediums the Counterpoise to the attraction of the iron by the Loadstone in the water & air was in
a manner the same in both mediums but whereas the Expt. was made first in the water & then in
the air. It was orderd that the next day it should be made first in the air & then in the water.
besides it being mentiond by mr Hooke that the motion of the Celestiall bodys might be represented
by pendulums it was orderd that this should be shewed at the next meeting.
May. 23. 1666. (grillo talpa). Sandwich Letter) mr. Hooke here & Dr. wallis at oxford were pitched
vpon for holding an astronomicall correspondency wth. Ld. Sandwich at madrid. mr. Hooke proposd
that the Distance of the moons center from 2 or more fixt starrs when shee is full south as well as
the other places mentiond by the Ld. Sandwich might be Obserued. The same was orderd to take the
paper of mr Rooke deliuerd by Sr. R moray to Oldenburg. conteining some obseruations of the satellites
of and to deduce thence the periods of their Reuolutions. There was read a paper of mr Hooks
Explicating the Inflection of a direct motion into a curue by a supervening attractiue principle
[In margin]Vz.   which was orderd to be Registred the Discourse conteind therein in an introduction to an Expt to shew
that circular motion is compounded of an indeauour by a Direct motion by the tangent and of
an other Indeauour tending to the center to which purpose there was a pendulum fastned to
the Roof of a Room wth. a large wooden ball of Lignum Vitae on the end of it and it was -
found that if the impetus of the Indeauour by the tangent at the first setting out was stronger
then the indeauour to the center, there was then generated an ellipticall motion whose
Longest was parrallell to the dis direct indeauour of the body in the first of the pulse, but
if that impetus were weaker then that Indeauour to the center there was generated such an ellipti
call motions whose shorter Diameter was parallell to the direct indeauour of the body in
the first point of impuls, if both equall there was made a perfect circular motion. There was
also made an other Expt. by fastning another small pendulous body by a shorter string
on the lower part of the wire which the greater was suspended by that It might
freely make a circular or Ellipticall motion round about the bigger. whilst the bigger
moued circularly or Elliptically about another center. the Intention whereof was to Explicate
the manner of the moons motion about the Earth It appearing Euidently thereby that whe^/nei/ther
the bigger ball which represented the earth nor the lesse which represented the moon were moued in
soe perfect a circle or ellipsis as otherwise they would haue moued in if either of them had been
suspended & moued singly. but that a certaine point which seemd to haue been the center of grauity
of these two bodys howsoeuer posited considerd as one seemd to be regularly moued in such a
circle or Ellipsis the two balls hauing other peculiar motions in small epicycles about the sd. point
(wallis answer to Objections) Dr. Godderd objection) other objections) mr Hook brought in his thoughts of
mor. Petits dissertation of the nature of Comets, the substance of whose sense was that he found that mor
Petits obseruations of the two last comets did in the generall agree wth those he had made himself and
wth. the best he had met wth of others. and that the hypothesis therein argued for were very Inge
nious & some of them not improbable, but whether the comet were moued in equall spaces
of a curue line in equall spaces of time which mor. petit seems inclined to beleiue did de=
serue to be further Examined by such obseruations as haue been made accurate enough to de
termine the Distance or paralax of it in seuerall places of its Appearance to determine the Para
lax of the Comet (Sr. Theod. Meyerns paper about Coloration). orderd that the Persons following. Sr G Ent
Sr. Theodore deVaux Dr. Godderd, Dr. Quatremaine, Dr. merrit Dr. whistler, Dr. Clark Dr. charleton of the rest
of the rest of the Physitians of the Society as also mr Dan Cox mr Hook mr oldenburg or any two or more
of them should be a committe to consider of the said papers & to gett them Englished they being most in french.
that soe they might be the better digested after the place & time of meeting at Sr. Georg Ents house on
munday next after noon (Colwall sharks head) Sr. Gilbert talbots swedish stone yealding Sulphur vitri
oll allum & minime (mr Dan: Cox said we had the same kind of stone but it yealded noe minium.
(mr. Hoskins paper of man killd by lightning) Coll Blunt & mr Hooke were orderd to appear on saturday
next in the afternoon in St. Georges fields wth their new Chariotts to compare them together and it
was desired that as many of the society as could be present would be there. It was orderd mr Hooke
should giue those expts. wth. the pendulum before mentiond in writing at large together wth. the
Discourses he made of it. Dr. wilkins proposed that those balls might be soe orderd as to putt
some sand in them which by running out might shew the lines of those motions It was orderd this should
be done against next Day. - - The end of the Second Iournall Booke.

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