Table of Contents

September 1891; Volume s3-42,Issue 249

Extraterrestrial geology

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On the capture of comets by planets, especially their capture by Jupiter
H. A. Newton

American Journal of Science September 1891, s3-42 (249) 183-199; DOI: https://doi.org/10.2475/ajs.s3-42.249.183

Geomorphology

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Pleistocene fluvial planes of western Pennsylvania
Frank Leverett

American Journal of Science September 1891, s3-42 (249) 200-212; DOI: https://doi.org/10.2475/ajs.s3-42.249.200

General geochemistry

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A method for the determination of antimony and its condition of oxidation
F. A. Gooch and H. W. Gruener

American Journal of Science September 1891, s3-42 (249) 213-220; DOI: https://doi.org/10.2475/ajs.s3-42.249.213
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A method for the estimation of chlorates
F. A. Gooch and C. G. Smith

American Journal of Science September 1891, s3-42 (249) 220-223; DOI: https://doi.org/10.2475/ajs.s3-42.249.220

Miscellaneous

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Dampening of electrical oscillations on iron wires
John Trowbridge

American Journal of Science September 1891, s3-42 (249) 223-230; DOI: https://doi.org/10.2475/ajs.s3-42.249.223

Economic geology of ore deposits

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Genesis of iron ores by isomorphous and pseudomorphous replacement of limestone, etc.
James Putnam Kimball

American Journal of Science September 1891, s3-42 (249) 231-241; DOI: https://doi.org/10.2475/ajs.s3-42.249.231

Mineralogy

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On the constitution of certain micas, vermiculites, and chlorites
Frank Wigglesworth Clarke and E. A. Schneider

American Journal of Science September 1891, s3-42 (249) 242-251; DOI: https://doi.org/10.2475/ajs.s3-42.249.242

Stratigraphy

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A further note on the age of the Orange sands
Rollin D. Salisbury

American Journal of Science September 1891, s3-42 (249) 252-253; DOI: https://doi.org/10.2475/ajs.s3-42.249.252

Solid-earth geophysics

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Note on causes of the variations of the magnetic needle
Frank H. Bigelow

American Journal of Science September 1891, s3-42 (249) 253-256; DOI: https://doi.org/10.2475/ajs.s3-42.249.253

Vertebrate paleontology

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Notice of new vertebrate fossils
Othniel Charles Marsh

American Journal of Science September 1891, s3-42 (249) 265-269; DOI: https://doi.org/10.2475/ajs.s3-42.249.265