92

There was an attempt made of an Expt. to Discouer whether there be any air Generated Or consumed by Burning or
neither, which not succeeding it was thought fitt it should be tryd on Saturday next at the Curators Lodgings in Gresham
Colledge before such members of the Society as vse to meet there and the sucesse of it Reported at the next pub-
lique meeting. There was made an Expt soe contriued as to shew that water in a tube open at both ends will
when lifted vp stand at 8 inches before it begins to fall. The Curator was desired to Describe the contriuance of this
Expt. to be registred. [Flamst Letter fro Darby his calculatio of appulse of & planets to first starrs. [Listers of a Mushrome
Hecker of of & . ] mr Hooke took Flamst. papr abt. appulses but to restore them to be printed in transactions
The Presidt. suggested vpon occasion, that Mor. Hevelius should be asked when the Secretary writes to him whether he does
not vse a telescope with his quadrants as sextants in Liew of Sights. - mr Hooke intimated that the great toole for
Grinding the Reflecting glasse was now Ready. he was exhorted to put it to tryall & to Report to the Society of the Successe
Nou. 27. 1672. mr Boyles ball of sulphur melted in a glasse ball which like Electricall bodys attracted seuerall
light Substances also filings of copper. The same shewd that feathers being first attracted by this Sulphur Ball would
Leaue that Electricall body a passe to one not Electricall untoucht. as to a glase phiole -- Mr Hook produced
and Read a Discourse of his own conteining Diuers opticall tryalls made by himself which seem to Discouer some
new proprietys of Light and to exhibit seuerall phenomena in his Opinion not ascribable to Reflection or Refra
-ction, or any other hitherto known propriety of Light the rayes of light. He was desired to pursue these Expts.
in a conuenient season, and to Deliuer into the Society something of this Subiect to be registred to preserue it
from usurpation. --- The same made an Expt. to finde out whether air doe increase or Decrease by bur
-ning. the successe not prouing satisfactory, he was desired to Repeat the Expt the next Day. The same being called
vpon concerning the Large tool for grinding the Reflex glasse, said that he had tryd the said tool soe far as
to find it pretty Iust. [mr. Boyle of naphtha. -
Nou 30. Report of Accounts. and also Electio for next year made. --
Pages of 4th. Iourn book: Nou 19.1 | 26.4 | 30.6 | Dec. 3. 9 | 10. 12 | 17. 14 | 24. 17 | Ian 1669. 10. 19 | 14. 21 | 21. 23 | 28. 26| Feb 4. 28| 11. 29| 18. 33|
25. 35| march 4. 36| 11.39 | 18. 41 April. 1. 42 | 8. 44 | 15 46 | 29. 49 | May. 6. 51 | 20. 56 | 27. 60 | Iune . 3. 63 | 10. 65 | 17. 68 | Iuly 1. 71|
8. 73 | 22. 78 | Octob. 21. 80| 28. 84| Nou. 4. 87 | 11. 88. | 18.90 | 25. 93| 30 95 |Dec. 2. 98 | 9. 101 | 16. 102 | Ianuary 1670. 13. 105.
20. 107 | 27. 109 | Feb. 3. 111. | 10: 113. | 17. 119 | 24. 120 | March 3. 122 | 10. 125 | 17. 127 | 24. 131. | April. 7. 133 | 14. 133 | 21. 135| 28. 137
May 5. 139 | 19. 140 | 26. 142 | Iune 2. 144. | 9. 146.| 23. 148| Iuly 7. 149 | 21. 150 | 28. 151 | Oct. 27. 153 | Nou. 3. 155 | 10. 157. | 17. 158
30. 159 | Dec. 8. 161. | 15. 162 | Ian. 1671. 12. 164 | 19. 167 | 26. 169 | February 2. 171 | 9. 172 | 16. 174 | 23. 175 | March 9. 178
23. 181 | 30. 184. | Apr. 6. 186 | 20. 187 | 27. 189 | may 4. 190 | 11. 192 | 18: 194 | 25. 195 | Iune 8 197 | 15. 198 | 22. 199.
30. 201 | nou. 2. 202 | 9. 206 | 16. 208 | 23. 210 | 30. 214 | Dec. 7. 216 | 14. 220 | 21. 222 | Ian 1672. 11. 223 | 18 . 225 |
25. 227 | Feb. 1. 229 | 8. 230 | 15. 232 | 22. 234 | 29. 236 | Mar. 7. 237 | 14. 238 | 21. 240 | 28. 241 | Apr. 4. 243 | 18. 244
24. 247 | May. 1. 248 | 8. 290 | 15. 251 | 22. 252 | Iun. 5. 253 | 12 254 | 19. 255 | 26. 256 | Iuly. 3. 259 | 10. 260 Oct. 30. 26 |
Nou. 6. 263 | 13. 265 | 20. 267 | 27. 268 | 30. 270 | here end the 4 second th Iournall finishd Sep. 8. 1694 ----

Iournall. 5.

Dec. 4. 1672. the Expt. to find whether air increases or decreases by Burning, being Calld for the Curator affirmed that he had found it neither sensibly increast nor decreast a tryall hereof being made before the Society. it
miscarryed & was therefore orderd to be made again the next Day. [Lister letter about plants. to be shewd Grew -
mr Hooke being calld vpon about the Giuing in the heads of his late Discourse concerning some new proprietys of light, to be
Registred, he promised that vpon further prosecution of that subiect he would bring in the whole. The same gaue hopes
that he might be able to bring in the Large Reflex speculum at the next meeting
Dec. 11. Grews reflexion on Lister letter. Reisels Letter. and scull with mosse by Schroter. also binocular telescope.
Dec: 18. The Curator being absent by Reason of sicknesse noe expts. were made this Day. [Slusius Lettr. of Alhazens optick Problem
& of standing 75 inches. swamerdams Present. -
Ian. 8. 1673. Philosophicall transactio of December Deliuerd to mr Hooke [Dr Syloius Letter & 2d editio of his Idea. [grews designe about
vegetables. part Read] The curator desired to prepare Expts for next Day.
Ian 15. Grew to prosent the history of Plants another year. Collins to get subscriptions. mr Henshaws letter -
Ian 22. Colwall presented Greg. St Vincent de quod. -- Mr Hooke produced an essay of a Reflecting obiectiue glasse Speculum
being the segment of a sphere of 36 foot which he hoped when perfectly polisht would perform as much as a Refracting Obiect
glasse ofor 100 foot tube. He was Solicited to see it brought to perfection [Boyle liquor to harden Bread. [Malpighis Dis-
course of eggs, Monr Leibnitz shewed his arithmetick engine, to perform mehanically all the operations of Arithmetick
with certainty & speed. & particularly Multiplication after such a manner that a whole Series of numbers to be Multi-
plyd by other numbers, shall be multiplyed by the multi plyer & one number, by one only turne of the wheels of the machin
and if there be 2 numbers multiplycands the operation shall be Dispatched by 2 turnes & the addition of the 2 products
performed at the same time & soe on. And as for diuision that shall be performed by Determining the quotient wthout
Dividing. - He gaue some proof of what he sayd. but acknowledged the instrument to be imperfect. Which he
promised to gett perfected. as soon as he should be returned to Paris, where he had appointed a workman for it
whom he would Giue order to make Also compleat one for the seruice of this Society. who gaue him thanks
for his expressions of Respect
Ian. 29. Mr Boyles liquor was fixt Niter Deliquium. [Boyle & other limpid liquors producing a colour wthout precipita
-tion. a twig of osier black & flexible as whale bone. [Bucland Letter about freezing rain. 2ly Slusius method of
[In margin]q.   tangents. 3 swammerdam about anatomy. foramen ouale open in a Man. amphibious Animalls to be Dissected .&.
Mr Hooke said that the Reflexiue speculum he produced the Last Day was further polisht, and that he would
indeauour to get it finisht in a short time.
Feb: 5. the Curator produced again his Obiectiue Speculum for the Reflecting telescope, which he affirmed
to be now true, though not yet perfectly polisht. He said he would indeauour to giue it its due polish
against the next assembly - The same mentiond that he intended to haue an arithmeticall engine made
that should peform all the operations of Arithmetick with great Expedition & Certainly without making
vse of the Rhabdology and that much more simply than that of Mor Leibnitz Lately produced before the Society
He was incouraged to make good this proposition [Leibnitz left de Lance's Register of weather made by Guericks weather
glasse or Little Man] this Gaue occasion to speak of the weather clock soe often mentiond formerly & soe desireable & usefull and
it was ordered, that the Curator should not fail to get such a clock made for as soon as he could especially since in france
Italy & Germany, the curious were known to be ready to Ioyne their obseruations of weather with ours. The Curator
promised he would take care of it accordingly. -- Occasion being Giuen to speake of Petrifactions. It was mentioned
by the Curator, that he was very Credibly informed, there was a ground in Bedfordshire that would in a twelue monthes
time turne wood and other not stony matter into stone without vitiating the figure. - this was seconded by Sr R
moray who added that the King had expressed his minde of Buying that ground & walling it about on purpose
to make in it experiments touching petrifactions. - It was wished that his Maj. when there were a good oppor
tunity might be put in Mind thereof to comand it to be done. -- [mr. Henshaws clarks peice of amber & lignum
fossiles Digged 3 or 400 paces from the sea neer Copenhagen. Left with the curator, who sayd he was of opinion that
yellow amber was nothing but Rosin petrifyed.

Ref: CELL/RS/HF_094  © Centre for Editing Lives and Letters