rds._

Obs. 47. Of the Shepherd Spider.

_A description of its Eyes: and the sockets of its long legs: and a
Conjecture of the mechanical reason of its fabrick; together with a
supposition, that 'tis not unlikely, but Spiders may have the make of their
inward parts exactly like a Crab, which may be call'd a water Spider._

Obser. 48. Of the hunting Spider.

_A short description of it; to which is annext an excellent History of it,
made by Mr. _Evelyn_. Some further Observations on other Spiders, and their
Webs, together with an examination of a white Substance flying up and down
in the Air after a Fog._

Obser. 49. Of an Ant.

_That all small Bodies, both Vegetable and Animal, do quickly dry and
wither. The best remedy I found to hinder it, and to make the Animal lye
still to be observ'd. Several particulars related of the actions of this
Creature and a short description of its parts._

Obs. 50. Of the wandring Mite.

_A description of this Creature, and of another very small one, which
usually bore it company. A Conjecture at the original of Mites._

Observ. 51. Of a Crab-like Insect.

_A brief description of it._

Observ. 52. Of a Book-worm.

_A description of it; where by the way is inserted a digression,
experimentally explicating the _Phaenomena_ 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._

Observ. 57. Of Vinegar-worms.

_A description of them, with some considerations on their motions._

Obs. 58. Of the Inflexion of the Rays of Light in the Air.

_A short rehearsal of several _Phaenomena_. An attempt to explicate them:
the supposition founded on two Propositions, both which are indeavoured to
be made out by several Experiments, What density and rarity is in respect
of refraction: the refraction of Spirit of Wine compared with that of
common Water: the refraction of Ice. An Experiment of making an Undulation
of the Rays by the mixing of Liquors of d