Table of Contents

May 1893; Volume s3-45,Issue 269

General geochemistry

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On the deportment of charcoal with the halogens, nitrogen, sulphur, and oxygen
W. G. Mixter

American Journal of Science May 1893, s3-45 (269) 363-379; DOI: https://doi.org/10.2475/ajs.s3-45.269.363
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The influence of free nitric acid and aqua regia on the precipitation of barium as sulphate
P. E. Browning

American Journal of Science May 1893, s3-45 (269) 399-404; DOI: https://doi.org/10.2475/ajs.s3-45.269.399

Igneous and metamorphic petrology

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Note on some volcanic rocks from Gough's Island, South Atlantic
L. V. Pirsson

American Journal of Science May 1893, s3-45 (269) 380-384; DOI: https://doi.org/10.2475/ajs.s3-45.269.380

Geochemistry of rocks, soils, and sediments

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Note on some volcanic rocks from Gough's Island, South Atlantic
L. V. Pirsson

American Journal of Science May 1893, s3-45 (269) 380-384; DOI: https://doi.org/10.2475/ajs.s3-45.269.380

Paleobotany

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On a Champlain (?) deposit of Diatomaceae belonging to the littoral plain
Arthur Mead Edwards

American Journal of Science May 1893, s3-45 (269) 385-388; DOI: https://doi.org/10.2475/ajs.s3-45.269.385

Miscellaneous

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Refraction of light upon the snow
A. W. Whitney

American Journal of Science May 1893, s3-45 (269) 389-392; DOI: https://doi.org/10.2475/ajs.s3-45.269.389
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On electrical oscillations of low frequency and their resonance
M. I. Pupin

American Journal of Science May 1893, s3-45 (269) 420-429; DOI: https://doi.org/10.2475/ajs.s3-45.269.420

Applied geophysics

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Value of the force exerted by a current of electricity in a circular conductor on a unit magnetic pole at its center
S. T. Moreland

American Journal of Science May 1893, s3-45 (269) 392-393; DOI: https://doi.org/10.2475/ajs.s3-45.269.392

Mineralogy

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On cookeite from Paris and Hebron, Me
Samuel Lewis Penfield

American Journal of Science May 1893, s3-45 (269) 393-396; DOI: https://doi.org/10.2475/ajs.s3-45.269.393
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Mineralogical notes
Samuel L. Penfield

American Journal of Science May 1893, s3-45 (269) 396-399; DOI: https://doi.org/10.2475/ajs.s3-45.269.396
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On a rose-colored lime-and aluminabearing variety of talc
William Herbert Hobbs

American Journal of Science May 1893, s3-45 (269) 404-407; DOI: https://doi.org/10.2475/ajs.s3-45.269.404

Stratigraphy

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The Magothy Formation of northeastern Maryland
Nelson Horatio Darton

American Journal of Science May 1893, s3-45 (269) 407-419; DOI: https://doi.org/10.2475/ajs.s3-45.269.407