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Science, New Series, Vol. 61, No. 1570, Jan. 30, 1925


Previous Issue: New Series, Vol. 61, No. 1569, Jan. 23, 1925
Next Issue: New Series, Vol. 61, No. 1571, Special American Association Issue Containing the Reports of the Fifth Washington Meeting of the American Association for the Advancement of Science. Edited by Burton E. Livingston, Permanent Secretary, Feb. 6, 1925


Front Matter (4 pp.)


The American Association for the Advancement of Science
The Relationship of Certain "Free-Living" and Saprophytic Microorganisms to Disease, pp. 97-107
Richard P. Strong


Utilization and Conservation of the Timber Supply, pp. 107-109
Reginald H. Colley

The Romantic and Idealistic Appeal of Physics, pp. 109-110
Richard Hamer


Scientific Events
Sir William Osler Memorial, pp. 110-111
The Whippoorwill Expedition, p. 111
Annual Meeting of American Ceramic Society, pp. 111-112
Public Lectures at the Harvard Medical School, p. 112


Scientific Notes and News, pp. 112-116
University and Educational Notes, pp. 116-117


Discussion and Correspondence
A Note on the Surface Viscosity of Colloidal Solutions, p. 117
P. Lecomte Du Noüy
Number of United States Scientists When the Sigma Xi Society Was Founded, pp. 117-118
Florian Cajori
Enlarged Parathyroids in Rachitic Chickens, p. 118
L. P. Doyle
Fall of a Meteorite in British Columbia, p. 118
Harlan I. Smith


Special Articles
On the Upper Critical Concentration of Oxygen in Root Growth, pp. 118-120
W. A. Cannon
The Seed-Corn Maggot and Potato Blackleg, p. 120
J. G. Leach


Science News, pp. x+xii+xiv

Previous Issue: New Series, Vol. 61, No. 1569, Jan. 23, 1925
Next Issue: New Series, Vol. 61, No. 1571, Special American Association Issue Containing the Reports of the Fifth Washington Meeting of the American Association for the Advancement of Science. Edited by Burton E. Livingston, Permanent Secretary, Feb. 6, 1925



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