Table of Contents

October 1895; Volume s3-50,Issue 298

General geophysics

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Recent progress in optics
W. LeConte Stevens

American Journal of Science October 1895, s3-50 (298) 277-286; DOI: https://doi.org/10.2475/ajs.s3-50.298.277
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Studies in electro-magetic theory; I, The law of electro-magnetic flux
M. I. Pupin

American Journal of Science October 1895, s3-50 (298) 326-341; DOI: https://doi.org/10.2475/ajs.s3-50.298.326

Mineralogy of non-silicates

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Quantitative determination of perchlorates
D. A. Kreider

American Journal of Science October 1895, s3-50 (298) 287-297; DOI: https://doi.org/10.2475/ajs.s3-50.298.287

Economic geology of ore deposits

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On an occurrence of copper in western Idaho
Robert Lawrence Packard

American Journal of Science October 1895, s3-50 (298) 298-300; DOI: https://doi.org/10.2475/ajs.s3-50.298.298

Miscellaneous

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Demonstration of caustics
R. W. Wood

American Journal of Science October 1895, s3-50 (298) 301; DOI: https://doi.org/10.2475/ajs.s3-50.298.301

General geochemistry

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Spectrum of helium
W. Crookes

American Journal of Science October 1895, s3-50 (298) 302-308; DOI: https://doi.org/10.2475/ajs.s3-50.298.302

Igneous and metamorphic petrology

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On the igneous rocks of the Sweet Grass Hills, Montana
Walter Harvey Weed and L. V. Pirsson

American Journal of Science October 1895, s3-50 (298) 309-313; DOI: https://doi.org/10.2475/ajs.s3-50.298.309

Solid-earth geophysics

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Distribution and secular variation of terrestrial magnetism; No. III
L. A. Bauer

American Journal of Science October 1895, s3-50 (298) 314-325; DOI: https://doi.org/10.2475/ajs.s3-50.298.314