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Science, New Series, Vol. 80, No. 2087, Dec. 28, 1934


Previous Issue: New Series, Vol. 80, No. 2086, Dec. 21, 1934
Next Issue: New Series, Vol. 81, No. 2088, Jan. 4, 1935


Front Matter (4 pp.)
Some Responsibilities of Science with Relation to Government, pp. 597-601
John C. Merriam

The Dual Principles of Evolution, pp. 601-605
Henry Fairfield Osborn

The Measurement of Personality, pp. 605-608
Lewis M. Terman


Obituary
Sir Horace Lamb, pp. 608-609
Recent Deaths, p. 609


Scientific Events
Symposia on Distillation at the Massachusetts Institute of Technology, p. 609
Dedication of the Washington, North Carolina, Field Museum, pp. 609-610
The Twenty-Fifth Anniversary of the New York Neurological Institute, p. 610
Award of the William H. Nichols Medal, pp. 610-611
The Edison Medal Award, p. 611


Scientific Notes and News, pp. 612-614


Discussion
A Photochemical Aspect of Nitrate Assimilation in Plants, pp. 615-616
W. E. Tottingham; E. J. Lease
Occurrence of Uniovular Twins in Multiple Births, p. 616
C. V. Green
A Blue Moon, p. 616
Perez Simmons


Scientific Books
A Treatise on Diffraction, p. 617
The Diffraction of Light, X-rays and Material Particles
Charles F. Meyer
Review author[s]: L. H. Germer
Books on Popular Astronomy, pp. 617-618
Leaflets
Dix Leçons d'Astronomie
E. Esclangon
When the Stars Come Out
Robert H. Baker
Handbook of the Heavens
H. J. Bernhard
Review author[s]: Frank Schlesinger
Timbers of North America, pp. 618-619
Identification of the Timbers of Temperate North America
Samuel J. Record
Review author[s]: R. H. Wetmore


Scientific Apparatus and Laboratory Methods
Water-Cooled Resistors, pp. 619-620
Edward M. Thorndike
Glass Blowers' Holder for Large Flasks, p. 620
Arthur F. Scott


Special Articles
The Origin of Pigment Cells in Amphibia, pp. 620-621
Graham P. DuShane
Hyperimmune Antipoliomyelitic Horse Serum, pp. 621-622
B. Howitt


Books Received, p. 622
Science News, pp. 10a+12a+14a

Previous Issue: New Series, Vol. 80, No. 2086, Dec. 21, 1934
Next Issue: New Series, Vol. 81, No. 2088, Jan. 4, 1935



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