Vol. 237, Issue 2, 1939 | Published by American Journal of Science

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The Black River Group in the Region Between Montreal and Quebec

Vladimir Joseph Okulitch

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Recent Changes of Level of the Land Relative to Sea Level

William Alfred Johnston

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Science Paper
Optical Orientation in Elongate Plastic Quartz
Russell Gibson Wayland
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Science Paper
Esker Chains of the Attleboro, Massachusetts, District
Lawrence Goldthwait
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Science Paper
Note on Temperature Attained in Burning Coal Seam
L. F. BradyJ. W. Greig
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Science Paper
Note on the Occurrence of Minute Gastropods in a Holocrystalline Slag
Lionel Francis Brady
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Branching of Callixylon

Edward Willard Berry

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Labradorite-hyper-oranite

Samuel S. GoldichGarrett A. Muilenburg

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Ozarkian and Canadian Brachiopods; Review

Charles Schuchert

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Science Paper
Karakorum Glaciology
A. L. Washburn
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Science Paper
Corrasion by Wind-Blown Snow in Polar Regions
Curt Teichert
The hardness of ice increases with decreasing temperature until at-50 degrees it has a hardness of about 6. No doubt then at low temperatures snow possesses the physical properties required...