Observ. [52]. Of a Book-worm.

A description of it; where by the way is inserted a digression, experimentally explicating the Phænomena of Pearl. A consideration of its digestive faculty.

Observ. [53]. Of a Flea.

A short description of it.

Observ. [54]. Of a Louse.

A description of its parts, and some notable circumstances.

Observ. [55]. Of Mites.

The exceeding smalness of some Mites, and their Eggs. A description of the Mites of Cheese: and an intimation of the variety of forms in other Mites, with a Conjecture at the reason.

Ob. [56]. Of small Vine-Mites.

A description of them; a ghess at their original; their exceeding smalness compar’d with that of a Wood-louse, from which they may be suppos’d to come.