Cooke, Josiah Parsons, 1827-1894 · Boston, Little, Brown and Company · leaf 197
system. It is,however, the same form asthat of Pig. 179, only abnor-mally developed in the direc-tion of one of the axes, ascould easily be proved bymeasuring the interfacial anglebetween any two faces, o, which would be found in every caseto be 109° 28. The common form of quartz is a hexagonal… … Fig. 179, Fig. 180.
Matter · Heat
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