Table of Contents

Articles

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  The mathematics of isostasy

  Thomas Chrowder Chamberlin

  American Journal of Science May 1920, s4-49 (293) 311-323; DOI: https://doi.org/10.2475/ajs.s4-49.293.311
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  Notes on the Manzano group, New Mexico

  Willis Thomas Lee

  American Journal of Science May 1920, s4-49 (293) 323-326; DOI: https://doi.org/10.2475/ajs.s4-49.293.323
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  The Piedmont terraces of the Northern Appalachians

  Joseph Barrell

  American Journal of Science May 1920, s4-49 (293) 327-362; DOI: https://doi.org/10.2475/ajs.s4-49.293.327
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  Relative densities of igneous rocks calculated from their norms

  Joseph Paxson Iddings

  American Journal of Science May 1920, s4-49 (293) 363-366; DOI: https://doi.org/10.2475/ajs.s4-49.293.363
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  Apthitalite (glaserite) from Searles Lake, California

  William Frederick Foshag

  American Journal of Science May 1920, s4-49 (293) 367-368; DOI: https://doi.org/10.2475/ajs.s4-49.293.367
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  Local unconformity between the Berkshire schist and the Stockbridge limestone in Adams, Massachusetts

  Thomas Nelson Dale

  American Journal of Science May 1920, s4-49 (293) 369-371; DOI: https://doi.org/10.2475/ajs.s4-49.293.369
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  Fossil botany in the western world; an appreciation

  Henry Brougham Guppy

  American Journal of Science May 1920, s4-49 (293) 372-374; DOI: https://doi.org/10.2475/ajs.s4-49.293.372