se,
{120} who shall see these Glasses, how they could be truly wrought to such
a Figure, with such a Cavity; & yet more, when they shall hear the Author
undertake to excavate other such _Eye-Glasses_ to above two inches, and
_Object-glasses_ of five inches _Diameter_. He hath likewise already begun
his _Object-glasses_ for the mentioned two _Ocular_ ones, of the same
Figure of about two inches _Diameter_, which are to be left all open, yet
without causing any colours. Of all which 'tis hoped, that shortly a fuller
and more particular accompt will be given.

* * * * *

_Monsieur _Auzout's_ Speculations of the Changes, likely to be discovered
in the _Earth_ and _Moon_, by their respective Inhabitants._

This Inquisitive _Philosopher_ in a letter of his, lately written to his
correspondent in _London_, takes occasion to discourse of his
considerations concerning those Changes, mentioned in the _Title_, as
followes;

I have (saith he) sometimes thought upon the _Changes_, which 'tis likely,
the supposed Inhabitants of the _Moon_ might discover in our _Earth_, to
see, whither reciprocally I could observe any such in the _Moon_. For
example, methinks, that the _Earth_ would to the people of the _Moon_
appear to have a different face in the several seasons of the year; and to
have another appearance in _Winter_, when there is almost nothing green in
a very great part of the _Earth_; when there are Countries all covered with
snow, others, all covered with water, others, all obscured with Clouds, and
that for many weeks together: _Another_ in _Spring_, when the Forrests and
Fields are green. _Another_ in _Summer_, when whole Fields are yellow &c.
Me thinks, I say, that _these_ changes are considerable enough in the force
of the reflexions of Light to be observed, since we see so many differences
of Lights in the _Moon_. We have _Rivers_ considerable enough to be seen,
and they enter far enough {121} into the Land, and have a bredth capable to
be observed. There are _Fluxes_ in certain places, that reach into large
Countries, enough to make there some apparent change; & in some of our Seas
there float sometimes such bulky masses of Ice, that are far greater, than
the Objects, which we are assured, we can see in the _Moon_. Again, we cut
down whole Forrests, and drain Marishes, of an extent large enough to cause
a notable alteration: And men have made such works, as have produced
Changes great eno