Table of Contents

Mineralogy

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  On the chemical composition of herderite and beryl, with note on the precipitation of aluminum and separation of beryllium and aluminum

  Samuel Lewis Penfield and D. N. Harper

  American Journal of Science August 1886, s3-32 (188) 107-117; DOI: https://doi.org/10.2475/ajs.s3-32.188.107
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  On ptilolite, a new mineral [from Jefferson County, Colorado]

  Charles Whitman Cross and L. G. Eakins

  American Journal of Science August 1886, s3-32 (188) 117-121; DOI: https://doi.org/10.2475/ajs.s3-32.188.117
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  On the crystallization of gold

  Edward Salisbury Dana

  American Journal of Science August 1886, s3-32 (188) 132-138; DOI: https://doi.org/10.2475/ajs.s3-32.188.132