The New Encyclopaedia Britannica, Volume 29Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 213
... occur simultaneously in most quartz crystals . The most frequent contact twins of quartz , those of two individuals inclined at 842 ° to each other , follow the Japanese law . In the tetragonal system the most common twinning occurs ...
... occur simultaneously in most quartz crystals . The most frequent contact twins of quartz , those of two individuals inclined at 842 ° to each other , follow the Japanese law . In the tetragonal system the most common twinning occurs ...
Page 290
... occur- ring element , important nuclear fuel . Not at all rare , uranium occurs in the Earth's crust to a greater extent than cadmium , bismuth , mer- cury , silver , and iodine . Some important uranium minerals are pitchblende ...
... occur- ring element , important nuclear fuel . Not at all rare , uranium occurs in the Earth's crust to a greater extent than cadmium , bismuth , mer- cury , silver , and iodine . Some important uranium minerals are pitchblende ...
Page 581
... occurs in the middle levels of the atmo- sphere and they die away at greater heights ; they may produce clouds , called wave clouds , and have an important effect on the weather . Lee waves occur most often when a deep air- stream with ...
... occurs in the middle levels of the atmo- sphere and they die away at greater heights ; they may produce clouds , called wave clouds , and have an important effect on the weather . Lee waves occur most often when a deep air- stream with ...
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