blished, both in _Persian_ and _Latine_, by Mr. _Thomas Hyde_, now
Library Keeper to the _Bodleyan_ Library in _Oxford_: (with Commentaries of
his annexed:) Like as another part of it hath formerly been by Mr. _John
Graves_. And it were a desirable work that the whole were Translated, that
we might be the better acquainted with what was the Eastern Astronomy at
that time.

* * * * *

_Published with License._

Oxford, Printed by _A: & L: Lichfield_, for _Ric: Davis_. 1666.

{147}

* * * * *

_Num._ 9.

PHILOSOPHICAL
_TRANSACTIONS._

* * * * *

_Munday_, _Feb._ 12. 1665/6.

* * * * *

The Contents.

_An _Apendix_ to the _Directions_ for Seamen, bound for far voyages. Of
the judgment of some of the _English_ Astronomers, touching the
difference between two learned men, about an Observation made of the
first of the two late _Comets_. Of a _Correspondency_, to be procured,
for the finding out of the _True_ distance of the _Sun_ and _Moon_ from
the Earth. Of an Observation not long since made in _England_ of
_Saturn_. An Account of some _Mercurial_ Observations, made with a
_Barometer_, and their Results. Some Observations of _Vipers_, made by
an _Italian_ Philosopher._

* * * * *

_An _Appendix_ to the _Directions_ for Seamen, bound for far Voyages._

Whereas it may be of good use, both _Naval_ and _Philosophical_, to know,
both how to sound depths of the sea _without a Line_, and to fetch up water
from any depth of the same; the following waies have been contrived by Mr.
_Hook_ to perform both; (which should have been added to the lately printed
_Directions for Seamen_, if then it could have been conveniently done.)
{148}

[Illustration]

_First_, for the sounding of depths without a Cord, consider _Figure_ 1,
and accordingly take a Globe of _Firr_, or _Maple_, or other light Wood, as
A: let it be well secured by Vernish, Pitch, or otherwise, from imbibing
water; then take a piece of Lead or Stone, D, considerably heavier then
will sink the Globe: let there be a long Wire-staple B, in the Ball A, and
a springing Wire C, with a bended end F, and into the said staple, press in
with your fingers the springing Wire on the bended end: and on it hang the
weight D, by its ring E, and so let Globe and all sink ge