Table of Contents

February 1871; Volume s3-1,Issue 2

General geophysics

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Observations on the variations of the magnetic declination in connection with the aurora of October 14th, 1870; with remarks on the physical connection between changes in area of disturbed solar surface and magnetic perturbations
Alfred M. Mayer

American Journal of Science February 1871, s3-1 (2) 77-82; DOI: https://doi.org/10.2475/ajs.s3-1.2.77

Igneous and metamorphic petrology

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Notes on granitic rocks
T. Sterry Hunt

American Journal of Science February 1871, s3-1 (2) 82-89; DOI: https://doi.org/10.2475/ajs.s3-1.2.82

Vertebrate paleontology

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On Siredon metamorphoses, etc.
E. D. Cope

American Journal of Science February 1871, s3-1 (2) 89-90; DOI: https://doi.org/10.2475/ajs.s3-1.2.89

Stratigraphy

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Lower Carboniferous limestone in Ohio
Ebenezer Baldwin Andrews

American Journal of Science February 1871, s3-1 (2) 91-92; DOI: https://doi.org/10.2475/ajs.s3-1.2.91

Invertebrate paleontology

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Brief contributions to zoology from the museum of Yale College; No. XI, Descriptions of some imperfectly known ascidians from New England
A. E. Verrill

American Journal of Science February 1871, s3-1 (2) 93-100; DOI: https://doi.org/10.2475/ajs.s3-1.2.93
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On insects inhabiting salt water
A. S. Packard

American Journal of Science February 1871, s3-1 (2) 100-109; DOI: https://doi.org/10.2475/ajs.s3-1.2.100
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On the existence of the nummulitic formation in China
Ferdinand von Richthofen

American Journal of Science February 1871, s3-1 (2) 110-113; DOI: https://doi.org/10.2475/ajs.s3-1.2.110
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Note on the Infusoria flagellata and the Spongiae ciliatae
H. James-Clark

American Journal of Science February 1871, s3-1 (2) 113-114; DOI: https://doi.org/10.2475/ajs.s3-1.2.113
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Note on transversely striated muscular fiber among the Gasteropoda
W. H. Dall

American Journal of Science February 1871, s3-1 (2) 123-125; DOI: https://doi.org/10.2475/ajs.s3-1.2.123

General geochemistry

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Memoir of Thomas Graham
Josiah P. Cooke

American Journal of Science February 1871, s3-1 (2) 115-123; DOI: https://doi.org/10.2475/ajs.s3-1.2.115

Quaternary geology

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Note to article I, on the Quaternary of the New Haven region
J. D. Dana

American Journal of Science February 1871, s3-1 (2) 125-126; DOI: https://doi.org/10.2475/ajs.s3-1.2.125

Miscellaneous

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Auroral belt of October 24th-25th, 1870
A. C. T.

American Journal of Science February 1871, s3-1 (2) 126-129; DOI: https://doi.org/10.2475/ajs.s3-1.2.126