Table of Contents

April 1871; Volume s3-1,Issue 4

Vertebrate paleontology

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Notice of the discovery of a cave in eastern Pennsylvania containing remains of post-Pliocene fossils...
Charles M. Wheatley

American Journal of Science April 1871, s3-1 (4) 235-237; DOI: https://doi.org/10.2475/ajs.s3-1.4.235

Sedimentary petrology

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On the geology of the delta and the mud lumps of the passes of the Mississippi
Eugene Woldemar Hilgard

American Journal of Science April 1871, s3-1 (4) 238-246; DOI: https://doi.org/10.2475/ajs.s3-1.4.238
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Amazonian drift
C. F. Hartt

American Journal of Science April 1871, s3-1 (4) 294-296; DOI: https://doi.org/10.2475/ajs.s3-1.4.294

Miscellaneous

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Contributions to physics from the Lawrence Scientific School
S. P. Sharples

American Journal of Science April 1871, s3-1 (4) 247-251; DOI: https://doi.org/10.2475/ajs.s3-1.4.247

Areal geology

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Notes on the geology of Santo Domingo
William More Gabb

American Journal of Science April 1871, s3-1 (4) 252-255; DOI: https://doi.org/10.2475/ajs.s3-1.4.252

Paleobotany

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On spore cases in coals
John William Dawson

American Journal of Science April 1871, s3-1 (4) 256-263; DOI: https://doi.org/10.2475/ajs.s3-1.4.256
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Notice of a fossil forest in the Tertiary of California
Othniel Charles Marsh

American Journal of Science April 1871, s3-1 (4) 266-268; DOI: https://doi.org/10.2475/ajs.s3-1.4.266

General geophysics

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On a method of fixing, photographing and exhibiting the magnetic spectra
Alfred M. Mayer

American Journal of Science April 1871, s3-1 (4) 263-266; DOI: https://doi.org/10.2475/ajs.s3-1.4.263

General geochemistry

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On the determination of the alkalies in silicates by ignition with carbonate of lime and sal-ammoniac
J. Lawrence Smith

American Journal of Science April 1871, s3-1 (4) 269-275; DOI: https://doi.org/10.2475/ajs.s3-1.4.269

Extraterrestrial geology

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On the great Sun spot of June, 1843
Daniel Kirkwood

American Journal of Science April 1871, s3-1 (4) 275-276; DOI: https://doi.org/10.2475/ajs.s3-1.4.275
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On the solar protuberances
L. Respighi

American Journal of Science April 1871, s3-1 (4) 283-287; DOI: https://doi.org/10.2475/ajs.s3-1.4.283

Hydrochemistry

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Calorimetric investigations
R. Bunsen

American Journal of Science April 1871, s3-1 (4) 277-282; DOI: https://doi.org/10.2475/ajs.s3-1.4.277

Invertebrate paleontology

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Brief contributions to zoology from the Museum of Yale College; No. XIII, Descriptions of new ascidians from New England
A. E. Verrill

American Journal of Science April 1871, s3-1 (4) 288-294; DOI: https://doi.org/10.2475/ajs.s3-1.4.288