To conclude therefore, it being very probable, that the Moon has a principle of gravitation, it affords an excellent distinguishing Instance in the search after the cause of gravitation, or attraction, to hint, that it does not depend upon the diurnal or turbinated motion of the Earth, as some have somewhat inconsiderately supposed and affirmed it to do; for if the Moon has an attractive principle, whereby it is not only shap’d round, but does firmly contain and hold all its parts united, though many of them seem as loose as the sand on the Earth, and that the Moon is not mov’d about its Center; then certainly the turbination cannot be the cause of the attraction of the Earth, and therefore some other principle must be thought of, that will agree with all the secundary as well as primary Planets.  But this, I confess, is but a probability, and not a demonstration, which (from any Observation yet made) it seems hardly capable of, though how successful future indeavours (promoted by the meliorating of Glasses, and observing particular circumstances) may be in this, or any other, kind, must be with patience expected.

* * * * *

FINIS.

* * * * *

THE TABLE.

Observat. 1.  Of the point of a Needle.

A Description of it:  what other Bodies have the sharpest points:  of the ruggedness of polisht Metal.  A description of a printed point.  Of very small writing, and the use of it for secret intelligence:  the cause of the coursness of printed lines and points.

Observ. 2.  Of the Edge of a Razor.

A description of it:  the causes of its roughness:  of the roughness of very well polisht Optick Glasses..

Obser. 3.  Of fine Lawn.

A description of it:  A silken Flax mention’d, an attempt to explicate the Phaenomena_ of it, with a conjecture at the cause of the gloss of Silk._

Observ. 4.  Of Tabby.

A short description of it.  A conjecture about the reason why Silk is so susceptible of vivid colours:  and why Flax and Hair is not.  A conjecture, that it way perhaps be possible to spin a kind of artificial Silk, out of some glutinous substance that may equalize natural Silk.

Observ. 5.  Of water’d Silks.

The great unaccurateness of artificial works.  A description of a piece of water’d Silk; an Explication of the cause of the Phaenomena_:  the way by which that operation is perform’d:  some other Phaenomena mention’d depending on the same cause._

Observ. 6.  Of Glass-Canes.