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Science, New Series, Vol. 73, No. 1895, Apr. 24, 1931


Previous Issue: New Series, Vol. 73, No. 1894, Apr. 17, 1931
Next Issue: New Series, Vol. 73, No. 1896, May 1, 1931


Front Matter (4 pp.)
Michael Faraday, pp. 433-439
W. F. G. Swann


Scientific Events
The Imperial Agricultural Research Bureaus, p. 440
Mineral Values in Alaska, pp. 440-441
The Forest Service and Highway Commissions, p. 441
Lectures in Physics at the University of Michigan, pp. 441-442
The Botanical Society of America, p. 442


Scientific Notes and News, pp. 442-446


Discussion
The Central Bodies Again, pp. 447-448
Edmund B. Wilson; Alfred F. Huettner
A New Posterior Pituitary Preparation, p. 448
C. G. MacArthur
The Occurrence of Filterable Forms of Bacteria in Nature, pp. 448-449
James M. Sherman; Clair E. Safford
Positive Gas and Water Pressure in Oaks, p. 449
C. A. Abell; C. R. Hursh
Analyses of the Blood of Idiots, pp. 449-450
Sidney S. Negus
Drawings from Photographs, p. 450
G. E. MacGinitie


Quotations
Industry and Scientific Research, pp. 450-451


Societies and Academies, p. 451


Scientific Apparatus and Laboratory Methods
An Adjustable Double-Slit, p. 452
R. William Shaw
A Fused Quartz Féry Prism, pp. 452-453
Nora M. Mohler
Sap for Analysis by Bleeding Corn Plants, p. 453
M. W. Lowry; Paul Tabor


Special Articles
Humidity and Comfort, pp. 453-455
W. H. Howell
Modification of Therapeutic Sera with a View of Avoiding Complications of Allergic Nature, pp. 455-457
J. Bronfenbrenner; D. M. Hetler; I. O. Eagle
A Possible Relationship between Hemoglobin and Chlorophyll as Shown by the Use of Liver Extract, pp. 457-458
Oran Raber
The Life Cycles of Trichogramma minutum in Relation to Temperature, p. 458
S. E. Flanders


Books Received, p. 458
Science News, pp. 10a-14a

Previous Issue: New Series, Vol. 73, No. 1894, Apr. 17, 1931
Next Issue: New Series, Vol. 73, No. 1896, May 1, 1931



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