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Table of Contents

September 1870; Volume s2-50,Issue 149

Solid-earth geophysics

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    Comparison of the mean daily range of the magnetic declination, with the number of auroras observed each year, and the extent of the black spots on the surface of the Sun
    Elias Loomis
    American Journal of Science September 1870, s2-50 (149) 153-171; DOI: https://doi.org/10.2475/ajs.s2-50.149.153

Quaternary geology

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    On a new period in chronology, called the precession period
    J. W. French
    American Journal of Science September 1870, s2-50 (149) 172-174; DOI: https://doi.org/10.2475/ajs.s2-50.149.172
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    Observations on prehistoric archaeology in Greece
    George Finlay
    American Journal of Science September 1870, s2-50 (149) 251; DOI: https://doi.org/10.2475/ajs.s2-50.149.251

General geochemistry

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    Upon the atomic volumes of solid compounds
    Frank Wigglesworth Clarke
    American Journal of Science September 1870, s2-50 (149) 174-183; DOI: https://doi.org/10.2475/ajs.s2-50.149.174
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    Abstract of the second series of Professor Meissner's researches upon electrized oxygen
    George F. Barker
    American Journal of Science September 1870, s2-50 (149) 213-223; DOI: https://doi.org/10.2475/ajs.s2-50.149.213
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    Contributions to chemistry from the laboratory of the Lawrence Scientific School; No.12
    Anonymous
    American Journal of Science September 1870, s2-50 (149) 240-249; DOI: https://doi.org/10.2475/ajs.s2-50.149.240

Extraterrestrial geology

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    Considerations on the apparent inequalities of long period in the mean motion of the Moon
    Simon Newcomb
    American Journal of Science September 1870, s2-50 (149) 183-194; DOI: https://doi.org/10.2475/ajs.s2-50.149.183
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    On the corona seen in total eclipses of the Sun
    W. A. Norton
    American Journal of Science September 1870, s2-50 (149) 250; DOI: https://doi.org/10.2475/ajs.s2-50.149.250

Applied geophysics

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    Researches in electro-magnetism
    Alfred M. Mayer
    American Journal of Science September 1870, s2-50 (149) 195-212; DOI: https://doi.org/10.2475/ajs.s2-50.149.195

Invertebrate paleontology

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    Description of Sclerostoma pinguicola, a new species of Entozoa, from the the hog
    A. E. Verrill
    American Journal of Science September 1870, s2-50 (149) 223-224; DOI: https://doi.org/10.2475/ajs.s2-50.149.223
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    Notes on the structure of the Crinoidea, Cystidea and Blastoidea
    E. Billings
    American Journal of Science September 1870, s2-50 (149) 225-240; DOI: https://doi.org/10.2475/ajs.s2-50.149.225
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American Journal of Science
Vol. s2-50, Issue 149
September 1870
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