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Science, New Series, Vol. 64, No. 1648, Jul. 30, 1926


Previous Issue: New Series, Vol. 64, No. 1647, Jul. 23, 1926
Next Issue: New Series, Vol. 64, No. 1649, Aug. 6, 1926


Front Matter (6 pp.)
Biology and Experimentation, pp. 97-105
H. S. Jennings


The American Association for the Advancement of Science
The Mills College Meeting of the Pacific Division, pp. 105-112
W. W. Sargeant


The International Congress of Plant Sciences, pp. 112-113
Lester W. Sharp


Scientific Events
Helium in the Natural Gases of Japan, pp. 113-114
Research Fellows in Mining and Metallurgy of the Carnegie Institute of Technology, p. 114
Mental Hygiene at Yale University, pp. 114-115
The Rockefeller Foundation and the League of Nations, p. 115


Scientific Notes and News, pp. 115-118
University and Educational Notes, pp. 118-119


Discussion
Geologic Age Calculations, p. 119
Alfred C. Lane
Aerial Music in Yellowstone Park, pp. 119-120
Stephen A. Forbes
Variations in Colors of Flowers, p. 120
Jens Jensen
Zygophyllum Fabago in the United States, p. 120
Stewart H. Burnham


Scientific Books
----------------, pp. 120-121
Bacterial Infection with Special Reference to Dental Practice
J. L. Appleton
Review author[s]: Ivan C. Hall


Special Articles
A Preliminary Note on the Etiology of Verruga Peruviana, pp. 121-122
Hideyo Noguchi; Oswaldo Hercelles
On the Extension of the Debye-Hückel Theory of Strong Electrolytes to Concentrated Solutions, p. 122
T. H. Gronwall; Victor K. LaMer


Science News, pp. viii+x+xii

Previous Issue: New Series, Vol. 64, No. 1647, Jul. 23, 1926
Next Issue: New Series, Vol. 64, No. 1649, Aug. 6, 1926



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