Table of Contents

Articles

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  The crystal structures of some carbonates of the calcite group

  Ralph Walter Graystone Wyckoff

  American Journal of Science November 1920, s4-50 (299) 317-360; DOI: https://doi.org/10.2475/ajs.s4-50.299.317
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  Entelodonts in the Marsh Collection

  E. L. Troxell

  American Journal of Science November 1920, s4-50 (299) 361-386; DOI: https://doi.org/10.2475/ajs.s4-50.299.361
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  The age of the Dakota flora

  Edward Wilber Berry

  American Journal of Science November 1920, s4-50 (299) 387-390; DOI: https://doi.org/10.2475/ajs.s4-50.299.387
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  An occurrence of naumannite in Idaho

  Earl Victor Shannon

  American Journal of Science November 1920, s4-50 (299) 390-391; DOI: https://doi.org/10.2475/ajs.s4-50.299.390