Micrographia / Some Physiological Descriptions of Minute Bodies Made by Magnifying Glasses with Observations and Inquiries Thereupon

by Robert Hooke

Observ. [12]. Of Gravel in Urine.

A description of such Gravel, and some tryals made with it, and conjectures at its cause.

Obser. [13]. Of Diamonds in Flints.

A description and examination of some of them, explicated further by Cornish Diamonds: several Observations about reflection and refraction: and some deductions therefrom; as an explication of whiteness; that the Air has a stronger reflection then Water. How several Bodies may be made transparent: an explication of the Phænomena of Oculus Mundi. Of the regular Geometrical Figures of several Bodies: an hypothetical explication mentioned: the method of prosecuting this inquiry.

Observ. [14]. Of frozen Figure.

The Figures of hoar Frost, and the Vortices on windows: several Observations on the branched Figures of Urine: the Figures of Regulus Martis stellatus, and of Fern. Of the Figures of Snow. Of frozen water.

Observ. [15]. Of Kettering-Stone.

A description of the Figure of the Particles, and of the Pores, and of the Contexture. Several Observations and Considerations thereupon: some Conjectures about the medium and propagation of light, and the constitution of fluid and transparent Bodies. Several Experiments to prove the porousness of Marble, and some other Stones. An account of some Experiments to this purpose made on an Oculus Mundi: some other Considerations and Experiments about the porousness of Bodies: some other Considerations about the propagation of light and refraction.

Observ. [16]. Of Charcoal.

Of two sort of Pores to be found in all Woods and Vegetables; the shape of them; the number, thickness, manner and use of these Pores. An explication of the Phænomena of Coals. The manner of charring Wood, or any other body. What part of Wood is combustible. An Hypothesis of fire explicated in twelve particulars, wherein the Action of the Air, as a Menstruum in the dissolution of all sulphureous bodies, is very particularly explicated, and some other Considerations about the Air proposed: the examination of a piece of Lignum fossile sent from Rome, and some Conclusions thence deduc’d.