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mr. Henshaw affirmed that there was a way by wch. the whole
body of sea salt might be conuerted into an /insipid water./ alcalizate
salt vizt. by heating of it very hott & suffering it to run
per Deliquium then Heating the Remainder and suffering
that to Run also and by soe continuing to Heat the Re=
mainder the whole body of the salt will at last be
conuerted into an true Alcalizate Salt Insipid liquor -
much after the manner as Dr Dickenson had by long cir
culation conuerted the /18/20 of the/ whole body of water into white
earth.

Herevpon was occasioned a great Discourse about the cause
of the salt nesse of the sea, some being of opinion
that the saltnesse of the sea proceeded only from
the Heat of the sun vpon the sea in the Torrid
Zone, though the greater part were of Opinion
that the saltnesse of the sea proceeded from the
Dissolution of the salt mineralls of the earth either
at the Bottom or sides of the sea or brought into it
by salt springs made by the Raine waters passing
through salt mines.

mr. Hally related two ^ /magneticall/ obseruations he had made in his Voy
=age to St. Helens .
The first was that the Dipping needle Lay horezontall at about
15 degrees behither the AEquinoctiall Line.
The second was was that northward of that place an Iron bein
held perpendicular the lower end would attract the south
pole and southwards of it the Lower end attracted the
north -
The Reason of wch. mr. Hooke Alledg supposed to be for that
The northern magneticall pole (As he had formerly shewd in
this society from the Examination of the variations obserued
in captain Iames his voyage to Hudsons Bay) was placed beyond
the Pole of the earth. towards our horizon. and not between the pole
of the earth and vs as mr. Bond supposed, and because that the

Ref: CELL/RS/HF_294  © Centre for Editing Lives and Letters