Table of Contents

Articles

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  Geochemical calculations concerning the total mass of sediments in the earth

  Philip Henry Kuenen

  American Journal of Science March 1941, 239 (3) 161-190; DOI: https://doi.org/10.2475/ajs.239.3.161
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  The radioactive determination of small amounts of uranium

  William Donald Urry

  American Journal of Science March 1941, 239 (3) 191-203; DOI: https://doi.org/10.2475/ajs.239.3.191
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  Permo-Triassic boundary in Idaho, Montana, and Wyoming

  Norman Dennis Newell and Bernhard Kummel

  American Journal of Science March 1941, 239 (3) 204-208; DOI: https://doi.org/10.2475/ajs.239.3.204
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  Course of Columbia River in southern central Washington

  Charles Reynolds Warren

  American Journal of Science March 1941, 239 (3) 209-232; DOI: https://doi.org/10.2475/ajs.239.3.209