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Showing 1 - 20 results of 232 for search '"sparring"', query time: 0.34s Refine Results
  1. 1
    by Parsons, Chas. L.
    Published in Science (1918)
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    ... since around 1780 been known as ''Iceland spar''. Few if any other localities yielding calcite crystals...
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  5. 5
    Published in Scientific American (1911)
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  6. 6
    ... since around 1780 been known as ''Iceland spar''. Few if any other localities yielding calcite crystals...
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    ...The dissolution of Iceland spar has been studied using a rotating disk method. This allows...
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    .... This can be demonstrated by placing known species of fungi on crystals of Iceland spar calcite...
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  19. 19
    ... in Iceland spar, a pencil of light transmitted through that substance is divided into two pencils; the index...
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  20. 20
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