A Summary of Progress in Petrography. in 1887-1896 |
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Page 3
... molecule ( i . e . , the arrange- ment of the atoms within the molecule ) and the activity of circularly polarizing substances , and applying the principles of this theory to the Sohacke - Wulff 15 theory of crystal structure , Becke 16 ...
... molecule ( i . e . , the arrange- ment of the atoms within the molecule ) and the activity of circularly polarizing substances , and applying the principles of this theory to the Sohacke - Wulff 15 theory of crystal structure , Becke 16 ...
Page 7
... molecules of crystals are polar , i.e. , that they possess different powers at diametrically opposite points , and that , other conditions being similar , a crystal face always possesses a maxiinum tendency to growth in a certain fixed ...
... molecules of crystals are polar , i.e. , that they possess different powers at diametrically opposite points , and that , other conditions being similar , a crystal face always possesses a maxiinum tendency to growth in a certain fixed ...
Page 5
... molecule comprises 11 Am . Jour . Sci . , May , 1890 , p . 352 . 12 Ib . , March , 1890 , p . 183 . 13 Dana . Bull . U. S. Geol . Survey , No. 12 , 1884 . 14 Miner . u . Petrog . Mitth . , XI . , 1890 , p . 223 . ∞ = 16 two metallic ...
... molecule comprises 11 Am . Jour . Sci . , May , 1890 , p . 352 . 12 Ib . , March , 1890 , p . 183 . 13 Dana . Bull . U. S. Geol . Survey , No. 12 , 1884 . 14 Miner . u . Petrog . Mitth . , XI . , 1890 , p . 223 . ∞ = 16 two metallic ...
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Common terms and phrases
acute bisectrix Al,O Amer AMERICAN NATURALIST amphibole analysis andesites apatite augite axial ratio basalt biotite bisectrix brown Bull calcite Colby University color colorless composition containing cordierite corresponding described diabase diorites double refraction dykes Edited by Dr epidote eruptive Fe,O feldspar FeO CaO MgO FeO MnO Förh formula gabbro garnet Geol gneiss grains granite green ground-mass H₂O hardness hexagonal hornblende inclusions isomorphous Jour Kryst Lacroix lamellæ lithophysæ lustre magma magnetite MAKERS SYRACUSE manganese mica microlites mineral occurs MINERALOGY AND PETROGRAPHY.¹ molecule monoclinic Na,O Na₂O nepheline Neues Jahrb olivine optical angle optical axes original orthoclase orthorhombic Petrog PETROGRAPHY.¹ Petrographical phenocrysts plagioclase pleochroic porphyritic porphyritic crystals pressure prismatic produced pyroxene quartz regarded resembles rhombohedral rocks scapolite schists silica small crystals specific gravity spherulites structure substance symmetry thin section tion twinning plane variety W. S. Bayley Waterville yellow yielded Zeits
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Page 5 - The olivine is surrounded by a reactionary rim consisting of an inner zone of hypersthene and an outer one of actinolite.