Page:Micrographia - or some physiological descriptions of minute bodies made by magnifying glasses with observations and inquiries thereupon.djvu/368

Rh common and other Sands: a description of a very small Shell.

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.

Observ. 17.Of Wood, and other Bodies, petrified.

Several Observations of divers ''kinds of these substances. A more'' particular examination and explication of one very notable piece of petrified Wood; and some Conjectures about the cause of those productions: several Observations made on other petrified Bodies, as shells, &c. And some probable Conclusions thence deduc'd, about the original cause of those Bodies.

Observ. 18.Of the Pores of Cork, and other Bodies.

Several Observations and Considerations about the nature of Cork: the number of Pores in a cubical Rh