A popular guide to minerals : with chapters on the Bement Collection of minerals in the American Museum of Natural History, and the development of mineralogy . Fig. 264 monoclinic (Fig. 264) ; Barite etched shows different pittings ondifferently related faces (Figs. 265=Fig. 237) ; the hemimorphicCalamine shows figures with dififerent ends (Fig. 266) ; in Calciteetching with hydrochloric acid gives figures like Fig. 267, withsulphuric acid like Fig. 268. Quartz crystals etched reveal their.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmineral, bookyear1912