. Transactions. Brin. , d= mm. 600° C. anneal Brin. (Z= Brin. , d= mm. 700° C. anneal Brin. , d= mm. Fig. 10.—Etched with ammonia and hydrogen peroxide. X 75. 442 A COMPARISON OF GRAIN-SIZE MEASUREMENTS PER CENT. REDUCTION

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries