Elementary chemical microscopy . elementarychemi00cham Year: 1921 270 ELEMENTARY CHEMICAL MICROSCOPY will be at once followed by the appearance of innumerable well formed characteristic crystals. If the formation of a crystalline crust cannot readily be induced, the seeding of the drop may be done by taking a tiny fragment of the compound from the reagent bottle, crushing it to powder upon a slide and introducing an infinitesimal fragment into the drop which refuses to crystallize. Note-book records should include diagrammatic sketches of the crystal form, extinction, extinction angles, plane

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Elementary chemical microscopy . elementarychemi00cham Year: 1921 270 ELEMENTARY CHEMICAL MICROSCOPY will be at once followed by the appearance of innumerable well formed characteristic crystals. If the formation of a crystalline crust cannot readily be induced, the seeding of the drop may be done by taking a tiny fragment of the compound from the reagent bottle, crushing it to powder upon a slide and introducing an infinitesimal fragment into the drop which refuses to crystallize. Note-book records should include diagrammatic sketches of the crystal form, extinction, extinction angles, plane angles

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