Page:Micrographia - or some physiological descriptions of minute bodies made by magnifying glasses with observations and inquiries thereupon.djvu/372

Rh 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 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.

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 Phænomena. 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 differing density. The'' explication of inflection, mechanically and hypothetically: what Bodies ''have such an inflection. Several Experiments'' to shew that the Air has this propriety; that it proceeds from the differing density of the Air: that the upper and under part of the Air are of differing density: some Experiments ''to prove this. A Table of the'' strength of the spring of the Air, answering to each degree of extension; when first made, and when repeated. Another Experiment of compressing ''the Air. A Table of the strength of the Air,'' answering to each compression and expansion; from which the height Rh