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Ch. 6: Illustrations, Index, Appendix

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464
INDEX.
W.
Water in rock crystal, analysis of, 265. Weiss and Rose, system of crystalliza­tion, 21. Wernerite, double refraction of, 83. Wolfram, 68 ; test of, 120 ; see Tungsten. Wollaston's goniometer, 53. Woodstone, 277.
Y.
Tttria, test of, 128.
z.
Zinc, blend, 64 ; test of 124
Zircon, double refraction of, 87; test of
123; described, 244; same as hyacinth
ib.; Tarieties, 245. Zuisang (lapis lasuli), 323.
Ch. 6: Illustrations, Index, Appendix Page of 515 Ch. 6: Illustrations, Index, Appendix
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