*

_Num._ 10.

PHILOSOPHICAL
_TRANSACTIONS._

* * * * *

_Munday_, _March_ 12. 1665/6.

* * * * *

The Contents.

_Observations continued upon the _Barometer_, or _Ballance of the Air_.
A Relation concerning the _Earth-quake_ neer _Oxford_; together with
some Observations of the sealed _Weatherglass_ and _Barometer_
thereupon by _Dr. Wallis_. A more full and particular Account of those
Observations about _Jupiter_, that were mention'd in Numb. 8. An
Account of some Books, lately publisht, _videl._ Mr. _Boyles_
Hydrostatical Paradoxes; _Steno_ de Musculis & Gladulis; _De Graeff_ de
Natura & Usu Succi Pancreatici._

* * * * *

_Observations continued upon the _Barometer_, or rather _Ballance of the
Air_._

These _Transactions_ being intended, _not only_ to be (by parcels) brief
Records of the Emergent Works and Productions in the Universe; Of the
Mysteries of Nature of later discoveries; And, of the growth of Useful
Inventions and Arts; _but_ also, and chiefly, to sollicite in all parts
mutuall Ayds and Collegiate endeavours for the farther advancement thereof:
We shall begin this _Second_ year of our Publications in this kind (in
which, for 3-moneths the Printing-presses were interrrupted by the publick
Calamity) with a few more particular Observations upon the _Ballance of the
Air_, as they are most happily invented and directed by Mr. _Boyle_; and
deserve to be prosecuted with care and diligence in all places.

But it is to be premised, that the Worthy person, who was alledged as the
Author of the Observations, delivered of this kind in the last of these
_Tracts_ (Dr. _Beale_) gives notice, That {164} he did not pretend to
exactness, but only to excite the carefulness of others in the several
distant places, and chiefly such, as can have the assistance of a
_Wheel-ballance_ perfectly filled: without both which aids he hopes not to
obtain all the benefits and mysteries of this Invention.

This being thus briefly intimated, the Account of the Observations
themselves, as they were extracted out of a late Letter of the same Person,
are, as followes:

[Sidenote: __Hygroscopes_ are Instruments, to discover the degrees of
Moisture and Drought of the Air._]

1. As I have fitted and filled the _Single Cane_, I can say in the general,
That I have not yet found any such infall