Table of Contents

Articles

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  Further remarks on the evolution of geologic climates

  Frank Hall Knowlton

  American Journal of Science October 1921, s5-2 (10) 187-196; DOI: https://doi.org/10.2475/ajs.s5-2.10.187
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  A study of Diceratherium and the diceratheres

  Edward Leffingwell Troxell

  American Journal of Science October 1921, s5-2 (10) 197-208; DOI: https://doi.org/10.2475/ajs.s5-2.10.197
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  Fossil vertebrates and the Cretaceous- Tertiary problem

  William Diller Matthew

  American Journal of Science October 1921, s5-2 (10) 209-227; DOI: https://doi.org/10.2475/ajs.s5-2.10.209