Table of Contents

April 1890; Volume s3-39,Issue 232

Sedimentary petrology

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The aeolian sandstones of Fernando de Noronha
J. C. Branner

American Journal of Science April 1890, s3-39 (232) 247-257; DOI: https://doi.org/10.2475/ajs.s3-39.232.247

Hydrochemistry

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A mountain study of the spectrum of aqueous vapor
C. S. Cook

American Journal of Science April 1890, s3-39 (232) 258-268; DOI: https://doi.org/10.2475/ajs.s3-39.232.258

Igneous and metamorphic petrology

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On the occurrence of basalt dikes in the upper Paleozoic series in central Appalachian Virginia; with notes on the petrography by J. S. Diller
Nelson Horatio Darton and Joseph Silas Diller

American Journal of Science April 1890, s3-39 (232) 269-271; DOI: https://doi.org/10.2475/ajs.s3-39.232.269
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The origin of the soda-granite and quartz-keratophyre of Pigeon Point [Minnesota]
William Shirley Bayley

American Journal of Science April 1890, s3-39 (232) 273-280; DOI: https://doi.org/10.2475/ajs.s3-39.232.273

Mineralogy

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Additional notes on the tyrolite from Utah
William Francis Hillebrand and E. S. Dana

American Journal of Science April 1890, s3-39 (232) 271-273; DOI: https://doi.org/10.2475/ajs.s3-39.232.271
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On the occurrence of polycrase or of an allied species in both North and South Carolina
William E. Hidden and J. B. Mackintosh

American Journal of Science April 1890, s3-39 (232) 302-306; DOI: https://doi.org/10.2475/ajs.s3-39.232.302

Hydrogeology

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Recent contributions to dynamical meteorology
F. Waldo

American Journal of Science April 1890, s3-39 (232) 280-293; DOI: https://doi.org/10.2475/ajs.s3-39.232.280

General geochemistry

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Two methods for the direct determination of chlorine in mixtures of alkaline chlorides and iodides
F. A. Gooch and F. W. Mar

American Journal of Science April 1890, s3-39 (232) 293-302; DOI: https://doi.org/10.2475/ajs.s3-39.232.293

Geomorphology

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Origin of some topographic features of central Texas
Ralph Stockman Tarr

American Journal of Science April 1890, s3-39 (232) 306-311; DOI: https://doi.org/10.2475/ajs.s3-39.232.306

Mineralogy of silicates

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On the formation of silver silicate
J. D. Hawkins

American Journal of Science April 1890, s3-39 (232) 311-312; DOI: https://doi.org/10.2475/ajs.s3-39.232.311