Table of Contents

December 1871; Volume s3-2,Issue 12

Geologic maps

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On the geological history of the Gulf of Mexico
Eugene Woldemar Hilgard, John Bulkley Perry, E. C. Andrews, George Little, Richard [American] Owen, Charles Abiathar White and Charles Whittlesey

American Journal of Science December 1871, s3-2 (12) 391-404; DOI: https://doi.org/10.2475/ajs.s3-2.12.391

Extraterrestrial geology

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On the astronomical proof of a resisting medium in space
Asaph Hall

American Journal of Science December 1871, s3-2 (12) 404-408; DOI: https://doi.org/10.2475/ajs.s3-2.12.404
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Description of a printing chronograph
G. W. Hough

American Journal of Science December 1871, s3-2 (12) 436-440; DOI: https://doi.org/10.2475/ajs.s3-2.12.436

General mineralogy

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On a new micrometic goniometer eye-piece for the microscope
J. P. Southworth

American Journal of Science December 1871, s3-2 (12) 408-409; DOI: https://doi.org/10.2475/ajs.s3-2.12.408

Paleobotany

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On the bearing of Devonian botany on questions as to the origin and extinction of species
John William Dawson

American Journal of Science December 1871, s3-2 (12) 410-416; DOI: https://doi.org/10.2475/ajs.s3-2.12.410

Vertebrate paleontology

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On some phenomena of binocular vision
Joseph LeConte

American Journal of Science December 1871, s3-2 (12) 417-426; DOI: https://doi.org/10.2475/ajs.s3-2.12.417

Invertebrate paleontology

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The American Spongilla, a craspedote, flagellate infusorian
H. James-Clark

American Journal of Science December 1871, s3-2 (12) 426-436; DOI: https://doi.org/10.2475/ajs.s3-2.12.426
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Notice of the Invertebrata dredged in Lake Superior in 1871 by the U. S. Lake Survey, under the direction of Gen. C. B. Comstock, S. I. Smith, naturalist
S. I. Smith and A. E. Verrill

American Journal of Science December 1871, s3-2 (12) 448-454; DOI: https://doi.org/10.2475/ajs.s3-2.12.448

Applied geophysics

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Longitude determination across the continent
George W. Dean

American Journal of Science December 1871, s3-2 (12) 441-448; DOI: https://doi.org/10.2475/ajs.s3-2.12.441

Quaternary geology

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On Kilauea and Mauna Loa
Titus Coan

American Journal of Science December 1871, s3-2 (12) 454-456; DOI: https://doi.org/10.2475/ajs.s3-2.12.454