Table of Contents

September 1885; Volume s3-30,Issue 177

Oceanography

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Origin of coral reefs and islands
James D. Dana

American Journal of Science September 1885, s3-30 (177) 169-190; DOI: https://doi.org/10.2475/ajs.s3-30.177.169

Mineralogy

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On a quartz twin from Albemarle County, Virginia
W. G. Brown

American Journal of Science September 1885, s3-30 (177) 191-194; DOI: https://doi.org/10.2475/ajs.s3-30.177.191

Structural geology

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Impact friction and faulting
G. F. Becker

American Journal of Science September 1885, s3-30 (177) 194-209; DOI: https://doi.org/10.2475/ajs.s3-30.177.194

Miscellaneous

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Transmission of light by wire gauze screens
S. P. Langley

American Journal of Science September 1885, s3-30 (177) 210-211; DOI: https://doi.org/10.2475/ajs.s3-30.177.210
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Variation of the magnetic permeability of nickel at different temperatures
C. A. Perkins

American Journal of Science September 1885, s3-30 (177) 218-230; DOI: https://doi.org/10.2475/ajs.s3-30.177.218

Economic geology of nonmetal deposits

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Geological relations of the gypsum deposits in Cayuga County, New York
Samuel Gardner Williams

American Journal of Science September 1885, s3-30 (177) 212-218; DOI: https://doi.org/10.2475/ajs.s3-30.177.212

Igneous and metamorphic petrology

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Enlargements of hornblende fragments
Charles Richard Van Hise

American Journal of Science September 1885, s3-30 (177) 231-235; DOI: https://doi.org/10.2475/ajs.s3-30.177.231
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On three masses of meteoric iron from Glorieta Mount, near Canoncito, Santa Fe County, New Mexico
George Frederick Kunz

American Journal of Science September 1885, s3-30 (177) 235-238; DOI: https://doi.org/10.2475/ajs.s3-30.177.235