Table of Contents

Articles

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  Emission of electrons by metals under the influence of alpha rays

  H. A. Bumstead and A. G. McGougan

  American Journal of Science October 1912, s4-34 (202) 309-328; DOI: https://doi.org/10.2475/ajs.s4-34.202.309
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  Flashing arcs; a volcanic phenomenon

  F. A. Perret

  American Journal of Science October 1912, s4-34 (202) 329-333; DOI: https://doi.org/10.2475/ajs.s4-34.202.329
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  Comparison of two screws

  C. Barus

  American Journal of Science October 1912, s4-34 (202) 333-337; DOI: https://doi.org/10.2475/ajs.s4-34.202.333
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  I, On some growth stages in Naticopsis altonensis McChesney; II, Notice of a Mississippian gastropod retaining coloration

  George Herbert Girty

  American Journal of Science October 1912, s4-34 (202) 338-340; DOI: https://doi.org/10.2475/ajs.s4-34.202.338
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  The slphides of zinc, cadmium, and mercury; their crystalline forms and genetic conditions; microscopic study by H. E. Merwin

  Eugene Thomas Allen, J. L. Crenshaw and Herbert E. Merwin

  American Journal of Science October 1912, s4-34 (202) 341-396; DOI: https://doi.org/10.2475/ajs.s4-34.202.341