404

That he would by those examine the weight of Gold Siluer
Copper tin Lead &c and on munday next make the tryalls
Herevpon seuerall Discourses were occasiond of about the nature &
temperature of Simple & mixt mettalls. And particularly about
the mettall of wch. the holes through wch. wire is drawn . . . .
are made. wch. mr Hooke said he had been Informd that it was made by one man
only and not known by any body els. it was Desired one of those plates wth. hole should
be procured against next Day.
Mr Henshaw mentiond that the way of hardening & tempering
tools for cutting porphiory was by quenching in the Distilled
water of Brauche Vrsina.

Mr. Haake Produced ^ /an extract of a Learned Gentlemans Letter fro neurenburg 24 Ian: 1680/ a Relation of a Strange obseruation
made on a dead corp which appeard all ouer couerd wth. hair, it
was orderd to be registred. he was Desired to thank the gentlema
and to Inquire further concerning it.

vpon ^/mentioning/ the obseruations that the hair was first very soft and after
wards hardned in the air. mr Hooke mentiond that the clesos of silkworms spiders catterpillers &c which in the body were oft
soe soon as they were Drawn into the air were hardned into a
threed.

Dr Tison vpon this occasion mentiond a Strange obseruatio
of his of Hair found in the ouarium of a woeman who Lately
Dyed. which hair he also shewd, he also mentiond that he had
found somewt. like it also in the ouary of a Bitch - he was Desi
red to bring in an account thereof in writing.

Mr Perkins Read an account of some obseruations he had
made about the variation of the magneticall needle which
he said varyed in seuerall in the nation ^ /in soe much that he could make it stand Due east & west/ - the account was orderd
to be Registred

The same also shewd an experiment wth a dipping needle where
by he indeauoured to proue his theory Mr Hooke namely by
making the Dipping needle incline in a north & south position
mr Hooke obiected that though a Dipping needle would
vary from the meridian according to various inclinations in seue
rall azymuths, gaue it as he had Long since found & reduced to
a theory yet he did not conceiue that the Loading or poising
a horizontall needle to such an inclination would not haue the
same effect. and therefore Doubted whether than would succeed. But
Mr. Perkins & mr. Flamstead both affirmed that the variation
would be much the same. mr. Perkins. Desird to be informed of as
many variations of the magnet as he could &c, that he might make a theory
of the variation.

Ref: CELL/RS/HF_406  © Centre for Editing Lives and Letters