Table of Contents

Articles

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  Revision and internal structures of Leurocycloceras

  Rousseau Hayner Flower

  American Journal of Science July 1941, 239 (7) 469-488; DOI: https://doi.org/10.2475/ajs.239.7.469
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  Determination of extinction angles in augite and hornblende with the universal stage according to the method of Conrad Burri

  John Coles Haff

  American Journal of Science July 1941, 239 (7) 489-492; DOI: https://doi.org/10.2475/ajs.239.7.489
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  Structural features in the Northwest Territories

  John Tuzo Wilson

  American Journal of Science July 1941, 239 (7) 493-502; DOI: https://doi.org/10.2475/ajs.239.7.493
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  A pollen study of post-Pleistocene lake sediments in the upper Sonoran life zone of Washington

  Henry Paul Hansen

  American Journal of Science July 1941, 239 (7) 503-522; DOI: https://doi.org/10.2475/ajs.239.7.503
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  The Carpathian; Black Hills cycadeoid parallel

  G. R. Wieland

  American Journal of Science July 1941, 239 (7) 523-532; DOI: https://doi.org/10.2475/ajs.239.7.523