Essai de Cristallographie, ou Description de figures Geometriques, propres a differens Corps du Regne Mineral, ...

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Paris: Didot jeune, et Knapen & Delaguette, 1772. 8vo. Orig. full mottled calf attractively rebacked in gilt compartments with raised spine bands and morocco titling-label. Marbled end-papers. (xxxii, 430pp.). With 2 fold. engrv. tables, 10 fold. engrv. plates, and engrv. head & tailpiece vignettes. Fine crisp copy. 1st ed. Complete. NOTE: The author was the celebrated French mineralogist, and discoverer of the law (law of constant angles) that the angles between the various faces of a crystal remain unchanged throughout its growth.