Table of Contents

October 1891; Volume s3-42,Issue 250

Environmental geology

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Some of the possibilities of economic botany
G. L. Goodale

American Journal of Science October 1891, s3-42 (250) 271-303; DOI: https://doi.org/10.2475/ajs.s3-42.250.271

Paleobotany

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On the vitality of some annual plants
T. Holm

American Journal of Science October 1891, s3-42 (250) 304-307; DOI: https://doi.org/10.2475/ajs.s3-42.250.304

General geochemistry

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A method for the separation of antimony from arsenic by simultaneous action of hydrochloric and hydriodic acids
F. A. Gooch and E. W. Danner

American Journal of Science October 1891, s3-42 (250) 308-312; DOI: https://doi.org/10.2475/ajs.s3-42.250.308
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Notes on allotropic silver
M. Carey Lea

American Journal of Science October 1891, s3-42 (250) 312-317; DOI: https://doi.org/10.2475/ajs.s3-42.250.312

Structural geology

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Structural geology of Steep Rock Lake, Ont
Henry Lloyd Smyth

American Journal of Science October 1891, s3-42 (250) 317-331; DOI: https://doi.org/10.2475/ajs.s3-42.250.317

Mineralogy

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On the so-called amber of Cedar Lake, North Saskatchewan, Can
Bernard James Harrington

American Journal of Science October 1891, s3-42 (250) 332-335; DOI: https://doi.org/10.2475/ajs.s3-42.250.332

Vertebrate paleontology

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Geological horizons as determined by vertebrate fossils
Othniel Charles Marsh

American Journal of Science October 1891, s3-42 (250) 336-338; DOI: https://doi.org/10.2475/ajs.s3-42.250.336