sht, and in great Reputation abroad, before I entred upon this Taske.
And no small Number are at present engaged for those weighty Productions,
which require _both_ Time and Assistance, for their due Maturity. So that
no man can from these Glimpses of Light take any just Measure of Your
Performances, or of Your Prosecutions; but every man may perhaps receive
some benefit from these Parcels, which I guessed to be somewhat conformable
to Your Design._

_This is my Solicitude, That, as I ought not to be unfaithful to those
Counsels you have committed to my Trust, so also that I may not altogether
waste any minutes of the leasure you afford me. And thus have I made the
best use of some of them, that I could devise; To spread abroad
Encouragements, Inquiries, Directions, and Patterns, that may animate, and
draw on_ Universal Assistances.

_The _Great God_ prosper You in the Noble Engagement of Dispersing the true
Lustre of his Glorious Works, and the Happy Inventions of obliging Men all
over the World, to the General Benefit of Mankind: So wishes with real
Affections,_

Your humble and obedient Servant

_HENRY OLDENBURG._

{1}

* * * * *

_Numb._ 1.

PHILOSOPHICAL
_TRANSACTIONS._

* * * * *

_Munday_, _March_ 6. 1664/5.

* * * * *

The Contents.

_An Introduction to this Tract. An Accompt of the Improvement of
_Optick Glasses_ at _Rome_. Of the Observation made in _England_, of a
Spot in one of the Belts of the Planet _Jupiter_. Of the motion of the
late _Comet_ praedicted. The Heads of many New Observations and
Experiments, in order to an Experimental _History of Cold_; together
with some _Thermometrical_ Discourses and Experiments. A Relation of a
very odd Monstrous _Calf_. Of a peculiar _Lead-Ore_ in _Germany_, very
useful for Essays. Of an _Hungarian Bolus_, of the same effect with the
_Bolus Armenus_. Of the New _American_ Whale-fishing about the
_Bermudas_. A Narative concerning the success of the _Pendulum-watches_
at Sea for the _Longitudes_; and the Grant of a _Patent_ thereupon. A
Catalogue of the Philosophical Books publisht by _Monsieur de Fermat_,
Counsellour at _Tholouse_, lately dead._

* * * * *

_The Introduction._

Whereas there is nothing more necessary for promoting the improvement of
Philosophical Matte