of the Moon, and consequently, it is exceedingly probable
also, that they are equidistant from the Center of
gravitation; and indeed, the figure of the superficial
parts of the Moon are so exactly shap’d, according
as they should be, supposing it had a gravitating principle
as the Earth has, that even the figure of those parts
themselves is of sufficient efficacy to make the gravitation,
and the other two suppositions probable: so that
the other suppositions may be rather prov’d by
this considerable Circumstance, or Observation, then
this suppos’d Explication can by them; for he
that shall attentively observe with an excellent
Telescope,
how all the Circumstances, notable in the shape of
the superficial parts, are, as it were, exactly adapted
to suit with such a principle, will, if he well considers
the usual method of Nature in its other proceedings,
find abundant argument to believe it to have really
there also such a principle; for I could never observe,
among all the mountainous or prominent parts of the
Moon (whereof there is a huge variety) that any one
part of it was plac’d in such a manner, that
if there should be a gravitating, or attracting principle
in the body of the Moon, it would make that part to
fall, or be mov’d out of its visible posture.
Next, the shape and position of the parts is such,
that they all seem put into those very shapes they
are in by a gravitating power: For first, there
are but very few clifts, or very steep declivities
in the ascent of these Mountains; for besides those
Mountains, which are by
Hevelius call’d
the
Apennine Mountains, and some other, which
seem to border on the Seas of the Moon, and those
only upon one side, as is common also in those Hills
that are here on the Earth; there are very few that
seem to have very steep ascents, but, for the most
part, they are made very round, and much resemble
the make of the Hills and Mountains also of the Earth;
this may be partly perceived by the Hills incompassing
this Vale, which I have here describ’d; and
as on the Earth also, the middlemost of these Hills
seems the highest, so is it obvious also, through
a good
Telescope, in those of the Moon; the
Vales also in many are much shap’d like those
of the Earth, and I am apt to think, that could we
look upon the Earth from the Moon, with a good
Telescope,
we might easily enough perceive its surface to be
very much like that of the Moon.
Now whereas in this small draught, (as there would
be multitudes if the whole Moon were drawn after this
manner) there are several little Ebullitions, or Dishes,
even in the Vales themselves, and in the incompassing
Hills also; this will, from this supposition, (which
I have, I think, upon very good reason taken) be exceeding
easily explicable; for, as I have several times also
observ’d, in the surface of Alabaster so ordered,
as I before describ’d, so may the later eruptions
of vapours be even in the middle, or on the edges
of the former; and other succeeding these also in
time may be in the middle or edges of these, &c. of
which there are Instances enough in divers parts of
the body of the Moon, and by a boyling pot of Alabaster
will be sufficiently exemplifi’d.