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» EXPLANATION 0*1 OF THE -v PLATES. j, i ua indebted to Count de Bournon and Abbe (any two of the moft able and diftinguilhed cryf- lUographers of the prefent age, for the greater num. er of the figures that accsmpany this work. I m- :nded to have completed the cryftal iuites of feveral f the fpecies that are ftill imperfe&, but want o rlfure and opportunity has prevented me. diamond. Fig! I'. Odaedron, in which each plane is divided nto fix, fo that the figure has 48 triangular faces . * We hope Count de Bournon will Mr. Creville. Zircon.