Toch, Maximilian, 1864-1946 · New York, D. Van Nostrand company · leaf 140
THE INERT FILLERS AND EXTENDERS 137 thicken it unduly. The defect produced by its incom- plete hydration will be to take up moisture from other No. 65. FRENCH TERRA ALBA.— Pho- No. 66. TERRA ALBA (French Gypsum) — tomicrograph X250, composition Photomicrograph x6oo, showing crys- CaSO4 + 2 H2O,… … No. 67. CALCIUM SULPHATE — Photo- No. 68. PRECIPITATED CALCIUM SUL- micrograph xsoo. Ppted. from cold, PHATE — Photomicrograph X3oo. Note moderately concentrated solutions. the long-fibred crystalline structure. Some of the gypsum sold in the east is made from alabaster, this being a native,…
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