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Science, New Series, Vol. 94, No. 2452, Dec. 26, 1941


Previous Issue: New Series, Vol. 94, No. 2451, Dec. 19, 1941
Next Issue: New Series, Vol. 95, No. 2453, Jan. 2, 1942


Volume Information (6 pp.)
Front Matter (12 pp.)
The Dyche Museum at the University of Kansas, pp. 593-598
Alexander Wetmore

Some Unsolved Problems of Theoretical Dynamics, pp. 598-600
George D. Birkhoff


Obituary
Elmer Samuel Imes, pp. 600-601
W. F. G. Swann
Max Kriss: 1894-1941, p. 601
E. B. Forbes
Deaths and Memorials, p. 601


Scientific Events
The Advisory Board on Sanitary and Public Health Engineering, p. 602
Research Grants of the Virginia Academy of Science, pp. 602-603
The American Chemical Society, p. 603
The Meeting of Mathematicians at Lehigh University, pp. 603-604
The Dallas Meeting of the American Association, p. 604


Scientific Notes and News, pp. 604-607


Discussion
Mean Sea-Level and Sand Movements, pp. 607-609
Harry Leypoldt
Zipf's "Law of Urban Concentration", p. 609
John B. Carroll
"The Breathing Mechanism of Turtles", p. 609
F. H. McCutcheon
On the Occurrence of Stereoisomeric Carotenoids in Nature, pp. 609-610
L. Zechmeister; W. A. Schroeder


Special Correspondence
Letter from Douglas Cockerell, Letchworth, England, October 1, to His Brother in Colorado, p. 610
T. D. A. Cockerell
Post-Graduate Course in Tropical Medicine at Tulane University, 1941-1942, pp. 610-611
Ernest Carroll Faust


Scientific Books
Gases, pp. 611-612
The Separation of Gases
M. Ruhemann
Atoms, p. 612
The World and the Atoms
C. Moller; E. Rasmussen
Review author[s]: M. E. Rose


Special Articles
The Protection of Mice against Infection with Air-Borne Influenza Virus by Means of Propylene Glycol Vapor, pp. 612-613
O. H. Robertson; Clayton G. Loosli; Theodore T. Puck; Edward Bigg; Benjamin F. Miller
Properties of the Isolated Macromolecular Component of Normal Chick Embryo Tissue, pp. 613-615
A. R. Taylor; D. G. Sharp; Dorothy Beard; J. W. Beard
Crystalline Catalase from Beef Erythrocytes, p. 615
Michael Laskowski; James B. Sumner


Scientific Apparatus and Laboratory Methods
A Grinder for Homogenizing Bacterial Clumps or Infected Tissues, pp. 615-616
John H. Hanks
Denaturation of Egg Albumin by Pressure, p. 616
E. A. Grant; R. B. Dow; W. R. Franks


Science News, pp. 10+12+14

Previous Issue: New Series, Vol. 94, No. 2451, Dec. 19, 1941
Next Issue: New Series, Vol. 95, No. 2453, Jan. 2, 1942



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