Table of Contents

December 1884; Volume s3-28,Issue 168

Quaternary geology

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The distribution and origin of drumlins
William Morris Davis

American Journal of Science December 1884, s3-28 (168) 407-416; DOI: https://doi.org/10.2475/ajs.s3-28.168.407

Economic geology of ore deposits

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Geological relations and genesis of the specular iron ores of Santiago de Cuba
James Putnam Kimball

American Journal of Science December 1884, s3-28 (168) 416-429; DOI: https://doi.org/10.2475/ajs.s3-28.168.416

Mineralogy

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A new tantalite locality [Black Hills, South Dakota]
Charles A. Schaeffer

American Journal of Science December 1884, s3-28 (168) 430; DOI: https://doi.org/10.2475/ajs.s3-28.168.430
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On colemanite, a new borate of lime
Abraham Wendell Jackson

American Journal of Science December 1884, s3-28 (168) 447-448; DOI: https://doi.org/10.2475/ajs.s3-28.168.447

Stratigraphy

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Note on Paleozoic rocks of central Texas
Charles Doolittle Walcott

American Journal of Science December 1884, s3-28 (168) 431-433; DOI: https://doi.org/10.2475/ajs.s3-28.168.431

Geomorphology

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On the sufficiency of terrestrial rotation for the deflection of streams
A. C. Baines

American Journal of Science December 1884, s3-28 (168) 434-436; DOI: https://doi.org/10.2475/ajs.s3-28.168.434

General geochemistry

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Chemical affinity
John W. Langley

American Journal of Science December 1884, s3-28 (168) 437-440; DOI: https://doi.org/10.2475/ajs.s3-28.168.437

Economic geology, geology of ore deposits

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Peculiar modes of occurrence of gold in Brazil
O. A. Derby

American Journal of Science December 1884, s3-28 (168) 440-447; DOI: https://doi.org/10.2475/ajs.s3-28.168.440

Igneous and metamorphic petrology

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On the decay of quartzite and the formation of sand, Kaolin, and crystallized quartz
James Dwight Dana

American Journal of Science December 1884, s3-28 (168) 448-452; DOI: https://doi.org/10.2475/ajs.s3-28.168.448