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Structures will vaniſh: The Ground will be clear before us; and if we loſe ourſelves in the open Way, 'tis eaſy to be ſet right again.
Spar formed by Nature, as above related, may either concrete in its pure State as ſoon as made; or it may paſs, while yet fluid, thro' various Strata of earthy, ſaline, Mineral, and other Matter, and receive great Changes both in Form and Colour from them: It may appear to us therefore, according to. theſe Circumſtances, either
in its own pure State of a colourleſs Rhomb;
or foul'd by Earths; or tinged by Metals;
or plated, by an Admixture of Talc;
or rendered cubic by the Natrane Marle; and thoſe Cubes ſtained to a Mimickry of Gems by Metals;
or it may be ſhaped into Polygons by an aluminous Earth;
or thrown into Pyramids, with or without Columns, by the Salts of Mineral Waters:
Or from the mere Nature of its Concretion, it may appear as Curtains ſpread upon a Wall:
as Icicles hanging from a Roof;
or Globules drop'd upon the Floor;
or as a Coat upon Moſſes, or Shells, or various other Matters.
According to theſe Accidents it may be thrown ate a Kind of Method, under the Terms Genus and Species, to great Advantage.
The
