Table of Contents

Articles

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  A metallographic description of some ancient Peruvian bronzes from Machu Picchu

  C. H. Mathewson

  American Journal of Science December 1915, s4-40 (240) 525-616; DOI: https://doi.org/10.2475/ajs.s4-40.240.525
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  A new cephalopod from the Silurian of Pennsylvania

  Ruth Raeder Mook

  American Journal of Science December 1915, s4-40 (240) 617-620; DOI: https://doi.org/10.2475/ajs.s4-40.240.617
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  Activity of Mauna Loa, Hawaii, December-January, 1914-15

  Thomas Augustus Jaggar

  American Journal of Science December 1915, s4-40 (240) 621-639; DOI: https://doi.org/10.2475/ajs.s4-40.240.621
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  Decomposition of mineral sulphides and sulfosalts by thionyl chloride

  H. B. North and C. B. Conover

  American Journal of Science December 1915, s4-40 (240) 640-642; DOI: https://doi.org/10.2475/ajs.s4-40.240.640
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  On simple and mixed alkyl phosphates

  W. A. Drushel

  American Journal of Science December 1915, s4-40 (240) 643-648; DOI: https://doi.org/10.2475/ajs.s4-40.240.643
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  Two new fresh-water gastropods from the Mesozoic of Arizona

  W. I. Robinson

  American Journal of Science December 1915, s4-40 (240) 649-651; DOI: https://doi.org/10.2475/ajs.s4-40.240.649
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  The Ordovician Cynthiana Formation

  Arthur McQuiston Miller

  American Journal of Science December 1915, s4-40 (240) 651-657; DOI: https://doi.org/10.2475/ajs.s4-40.240.651