ir depends upon the Sun or
Fire, or other Luminous Bodies. To this is annexed an Account of the
_Italian_ way of making _Conservatories_ of Ice and Snow, as the Author had
received it from that Ingenious and Polite Gentleman, Master _J. Evelyn_.
{52}

But want of time prohibiting the accomplishment of the intended account of
this Rich Piece: what remains, must be referred to the next Occasion. It
shall only be intimated for a Conclusion, that the _Author_ hath annexed to
this _Treatise_, an Examen of Master _Hob_'s Doctrine touching _Cold_;
wherein the _Grand_ Cause of _Cold_ and its Effects is assigned to _Wind_,
in so much that 'tis affirmed, that almost any Ventilation and stirring of
the Air doth refrigerate.

* * * * *

_LONDON,_

Printed with Licence, By _John Martyn_, and _James Allestry_, Printers to
the _Royal-Society_, 1665

{53}

* * * * *

_Numb._ 4.

PHILOSOPHICAL
_TRANSACTIONS._

* * * * *

_Munday_, _June_ 5. 1665.

* * * * *

The Contents.

_A Relation of some extraordinary Tydes in the _West Isles_ of
_Scotland_, by Sr. _Robert Moray_. The judgment of Monsieur _Auzout_,
touching the _Apertures_ of _Object-glasses_, and their _proportions_
in respect of the several lengths of _Telescopes_; together with a
_Table_ thereof. Considerations of the same Person upon Mr. _Hook's_
New Engine for grinding of _Optick-glasses_. Mr. _Hook's_ Thoughts
thereupon. Of a means to illuminate an _Object_ in what proportion one
pleaseth; and of the _distances_, that are requisite to burn Bodies by
the _Sun_. A further accompt by Monsieur _Auzout_ of Signior
_Campani_'s Book, and Performances about _Optick-Glasses_. _Campani_'s
Answer thereunto; and Mr. _Auzout_'s Animadversions upon that Answer.
An accompt of Mr. _Lower_'s newly published _Vindication_ of Dr.
_Willis_'s Diatriba de _Febribus_._

* * * * *

_A Relation of some extraordinary Tydes in the West-Isles of _Scotland_, as
it was communicated by Sr. _Robert Moray_._

In that Tract of _Isles_, on the West of _Scotland_, called by the
Inhabitants, the _Long-Island_, as being about 100. miles long from _North_
to _South_, there is a multitude of small Islands, situated in a _Fretum_,
or _Frith_, that passes between the Island of _Eust_