. Transactions. Fig. 1.—Fixe-Grained Gabbro, 24 Diameters ; Polarized Light ;NicoLS Crossed. Actual Field, 3 mm. Plagioclase (Pg),Orthoclase (Or), Pyroxene (Py), Magnetite (M).. Fig. 2.—Coarse-Gkained Gabbro, 18 Diameters; Polarized Light ;NicoLS Crossed. Actual Field, 4 mm. 18 A TITANIFEROUS IRON-ORE DEPOSIT. I

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries