74

by imploying more balls and Letting the Exterior fall against the Intermediats (capn. Salters turnd
work) Auzouts obseruat in Italy of variation of needle 1 1/2 degree westward.) discourse of of Bonds theory
Auzout at Septalys Study saw a magnet weigh . . 1 1/4 ounce which tooke vp. 77. ounces) wallis to Heuelius
about new starr in Cete) It was recomended to mr Hooke and others to take notice of this phenomen
(of telescopick glasses made at Paris wth. a turn lathe.)
Nou. 12. 1668. There was made the expt. to see the communication of motion by 3 balls of the same
wood of aequall bignesse were soe suspended that either of the two extreames being Lett fall from a cer
taine height against the intermediat ball the other extreame was impelled vpward to neer the same
height that in the middle mouing very Little of wch the Presid conceiud this the reason that the inter
mediat when struck by one of the Laterall found the Resistance of the other Laterall ball but this
other Laterall met noe other resistance but that of the air. The curator was orderd to think of
other Expt. to make out this hypothesis of motion which is that noe motion dyes nor is any mo=
tion produced anew. (Sr. R moray. to haue seuerall body of seuerall hardnesse to try rebounding also bodys
[In margin]Vz   not springy. all authors about motion to be consulted. mr Collins desired & Dr. Wallis also desired
Hugens letter, about motion). about testicles. Drawn into threads.) Story of apostumation bladder
Donato Rosettj book. of the true cause of aequlibrium. 2 of Archimdes de Insidentibus humus is fals.
3. that there is noe aether. 4. what is the whole weight of air. 5 the same of a part 6. the only
way of measuring the airs altitude. b. of examining whether Light be temporaneous). Norwoods
packett from Bermoodas. also packet from Aleppo & ispahan for next Day. -

Here ends the 3 Iournall Booke

Nou. 19. Mr Dan: Finch. Mr Io Lock. candidates. curiositys from Bermoodas
Nou. 26. Mr. Lock admitted. The Expt. Deuised & made this Day by the Curator, was the impelling of wooden balls both against
springy & not Springy bodys, wherby he did intend to evince that the Reflectio of Bodys Depends vpon the springnesse of
bodys. soe that where there is noe spring there can be noe Reflection. But the expt. mode being not Satisfactory to the Company
for the purpose Declared, the Curator proposd another to be made at the next meeting vizt. with a mettaline String made more
or Lesse tense to see what the Return or Reflex of it will be, according to its seuerall degrees of tension. Dr Croon suggested tht
it might be considerd whether the businesse of motion might not be made out without taking in the notion of springynesse
of Bodys. Mr. Old: produced a paper of Dr. Wallis written by him Nou. 15. 1668. in Oxford concerning the Generall Laws of motion. it
was orderd to be registred with thanks to the author -- about Examining testicles. - - it was also agreed vpon that on Saturday
next at mr Hookes Lodging in Gresham colledge the Persons of the Comtee for anatomicall Expts. would meet to make a Cut in the
kidney of a Dog to see if it would heal vp again. Colpresse Letter about Red & Opall glasse. -
nou. 30. Election Day. Mr Boyles new book prsented - - comitted to the care of Mr Hooke for the Library. -- Sr Ph. Vernattys present
fro India. -- All this was Deliuerd to the Curator for the Repository. -
Dec. 3. Heuelius his Selenography Deld. to Mr. Hooke for the Societys Library. - the East India prsent was deliuerd to mr Hooke for the
Repository -- Dr. Pope & mr. Hooke said tht Sr And. King had seen diuers amphisbenae in Spaine -- about the controuersy
of Hugens & Gregory [quere Letter Book]. -- There was attempted the Expt. to shew that rebounding was caused
by Springinesse with a brasse wire more or Lesse tense, but the apparatus being Defectiue, it was orderd that
the Expt. should be repeated the next Day. -- It was moued that the book lately presented to the Society by Mr.
Boyle Entitled A Continuation of new Expts. Physico mechanicall might be pervsed by some members of the Society
whereupo mr Hooke hauing the booke in his hands was desired to doe this.
Dec. 10. 1668. there was made an Expt. Diuised by the curator to shew how rebounding depends vpon the Springy
-nesse of bodys. it was made by a Springy plate of brasse bended in the form of an ouall, which being cutt or Burnt
asunder did Reflect two wooden balls of Different sizes, soe as that they were conceiued to moue in Recipro
call proportion to their magnitudes, the expt. was orderd to be prosecuted the next Day. -
mr. Hooke acquainted the Company that Dr. Allen had Examind the Testicles of a horse, & found it to be made vp of Vessells
Dr. Wallis his Letter answering mr neils querys [vide Letter booke. Dec. 5. 68] -- books Deliuerd to Curator for Societys Library. Vz
Mr. Hooke acquainted the company that he had lately made an obseruatio of one of the Eclipses of the made by one of the Satelittes on
Iupiter, and that it had happend at the very time assigned by Cassini in his Ephemerides Mediceorum. The same moued that mr
Oldenburge might be desired to write to the said Cassinj to Learn whether he hath calculated other Ephemerides of any year to
come and if soe, that he would please to comunicate them to the end that here as well as in Italy Obseruations may be made
to fide out the precise Difference of Meridians. Mr Old: vndertooke to write to him for that purpose
Dec: 17. - there was made an Expt. in prosecution of the notion That Springinesse is the cause of Rebounding. vizt a Woode
globe was let fall against wood, a gutt string & a brasse wire in the first case the Rebounding was Languid, & of a
very short Duration: in the 2d. it was much stronger, and more Durable, in the Last strongest and most Durable
of all. which was conceiued to proceed from the differing degrees of the force of the Spring in the seuerall bodys em-
ployed. The Curator took occasion to mention that he thought the air next to quicksilver gaue the quickest &
most forcible reflection; and that the sparkling of Diamants in Rings proceeded from the air Left behind the stones.
Dr. Wrens theory of the Collision of Bodys produced &c. -- The curator was orderd to take care tht the Expts. be made before
the Society, to verify the seuerall cases relating to the theory produced -- mr Hooke was Desired to bring in what
Dec. 24. noe meeting. Dec. 31. Dr Wrens Inuentio for smoking chimnys. Diuers Letters - It was moued that some expts
might be made wth. pendulums in an Exhausted Receiuer, to see wt Difference there is between their motions in such a Receiuer
and in the open air. As also to make tryall whether motion could be made quite to cease. Mr Hooke affirmed that
he did conceiue that the Impediment giuen by the air or other fluids to mouing bodys, did decrease in a continuall pro
portion, which the president desired, that it might be made out by Expt. [Vz thus all my theories were misunderstood &
all recorded. & insteed of hearing grounds & reason, experimts were always calld for. and all Loaded with obiections little to purpose]
[In margin]Ian 7   --- 1668
The Curator made an Expt to proue that the strength of a body moued in a duplicate proportion to its velocity
but the expt not suceeding by reason as was supposed by mr Hooke of the frost disordering the instrument employed
it was orderd it Should be repeated next Day. -- The same shewed a Way whereby a Segment of a sphericall glass
may be made to magnify an obiect to the very edges, and soe to perform the effect of a conick Section. It was obser
-ved by seuerall of the company that it Succeed accordingly, it being performed by meanes of water poured vpon the
sphericall glasse. The Curator was desired to shew it again at the next meeting. -- 2 letters of Heuelius. 1. &c
the 2d dated, ipso die Solstitij Brumalis 1668. containing an answer to some querys made by Mr Hooke concerning his Cometography formerly sent
him [vide Letter book.]

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