Table of Contents

Articles

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  Retrogressive metamorphism and phyllonitization

  Eleanora Frances Bliss Knopf

  American Journal of Science January 1931, s5-21 (121) 1-27; DOI: https://doi.org/10.2475/ajs.s5-21.121.1
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  Radium in rocks: II. Granites of eastern North America from Georgia to Greenland

  Charles Snowden Piggott

  American Journal of Science January 1931, s5-21 (121) 28-36; DOI: https://doi.org/10.2475/ajs.s5-21.121.28
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  Radioactivity of Stone Mountain springs

  J. A. Hootman and W. S. Nelms

  American Journal of Science January 1931, s5-21 (121) 37-38; DOI: https://doi.org/10.2475/ajs.s5-21.121.37
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  Isostasy and the figure of the earth

  W. Heiskanen

  American Journal of Science January 1931, s5-21 (121) 39-50; DOI: https://doi.org/10.2475/ajs.s5-21.121.39
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  On the origin of desert varnish

  Jerome Douglas Laudermilk

  American Journal of Science January 1931, s5-21 (121) 51-66; DOI: https://doi.org/10.2475/ajs.s5-21.121.51
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  Hydrated calcium silicates

  V. A. Vigfusson

  American Journal of Science January 1931, s5-21 (121) 67-78; DOI: https://doi.org/10.2475/ajs.s5-21.121.67
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  A new generic name for the coral Syringophyllun Grabau and Yoh 1929

  S. S. Yoh

  American Journal of Science January 1931, s5-21 (121) 79; DOI: https://doi.org/10.2475/ajs.s5-21.121.79