387

Ian: 29. 1679/80.

The President was Present.
The minutes of the 22. instant were Read, and vpon Discoursing of
the small creatures Discouered by Mr. Leuwenhoek, in Ginger water mixed
with Pepper Water It was orderd some should ........ /be prepared against the next meeting/
Dr Crone moued Mr Leuwenhoek might be choosen a member of ye Society and he being ^
Mr. Colwall moued that a magneticall needle might be made for the Society
and that it might be lent to Mr. Flamstead to make obseruations at Green
=wich of the variation of the needle . and it was orderd that such a needle should be
made and that Mr. Flamstead might take care to haue it very well made
Dr Huisch. Mr. Firman & Mr. Hauton being all seuerally put to the Ballot
were chosen members of this Society
Dr. Crone mouing that Mr. Leuwenhoek might be chosen a member of the
Society being. . . . and the Society chose the said Mr. Leewenehoek by
the Ballot. And Dr. Gale was Desired to draw up a Diploma to be sent to
him from this Society.

Mr Hooke Read An Account of the Experiments that had been shewn in the
society of the comparatiue weight of two mixed mettalls wth. the weights of
the seuerall metalls out of wch. they were compounded from which he deduced
that the Inuention of Archimedes ^/to find the cheat of the Goldsmith in making Hieros crown/ though in it self very ingenious might not
be sufficient to performe wt he Designed by it for that sometimes two metalls
compounded made a heauier and some other two, a much lighter then really
they ought.

Sr. Willm Petty explained the experiment whereby the two metalls seemd to be
penetrate each other, by /The/ filling a vessell first wth. large /bullets or/ ^ shot as of Cul
uerines, then /by/ putting into the same musquet bullets wch. would runn into
the cauetys between the culuerine shot, and when noe more of those could
be put in, ther by powring in small bird shot, then sand, & last of all
water. In euery of wch. fillings the vessell might be said to be as full
of those bodys as it could be and yet by reason of the interstices left
between them could receiue bodys of smaller parts.

He further Discoursd concerning wt. things were conuenient to be obserued
in other compositions for the future as Colour malleablenesse hardnesse
brittlenesse sonorousnesse &c. together also wth. the specifique grauity.
And mentiond that there were other qualitys also obseruable in some metalls
as that smiths did generally obserue that if any lead were spilt in their fire
the coales would not burn ^/nor will iron weld/ well till all those were thrown out
That tin put into Lead makes it brittle and vnfitt for some vses, these
he supposd myght be done by Disordering the parts of the Lead as by making those
parts Lye crosse wch. before Lay side by side, and supposed him to be a kind of fer
ment of metalls.
Vpon this It was Discoursd what was the best method of prosecuting Expt
and it was . . . . . . . Propounded by the President that the best way was
to proceed synthetically by first making the proposition what was Designed
to be proued & then proceeding wth. the Expts. to make tht proof.

Sr. Theodore De vaux Queryd whether it would be gratefull to the Society

Ref: CELL/RS/HF_389  © Centre for Editing Lives and Letters