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Science, New Series, Vol. 70, No. 1820, Nov. 15, 1929


Previous Issue: New Series, Vol. 70, No. 1819, Nov. 8, 1929
Next Issue: New Series, Vol. 70, No. 1821, Nov. 22, 1929


Front Matter (4 pp.)
The Instruments of Plant Biology, pp. 459-463
H. A. Spoehr

Surface Structure and Atom Building. II, pp. 463-470
W. D. Harkins


The American Association for the Advancement of Science
The Present Enrolment, pp. 470-471
Burton E. Livingston


Obituary
Horace Bushnell Patton, pp. 471-472
Alfred C. Lane
Memorials, p. 472
Recent Deaths, pp. 472-473


Scientific Events
Activities of the Rockefeller Foundation, p. 473
Lectures before the Mayo Foundation, pp. 473-474
Symposium on Aircraft Materials of the American Society for Testing Materials, p. 474
Astronomers Carrying on Researches at the Harvard Observatory, pp. 474-475
The Scientific Book Club, p. 475


Scientific Notes and News, pp. 476-477
University and Educational Notes, p. 478


Discussion
The Occurrence of Rotenone in the Peruvian Fish Poison ``Cube'', pp. 478-479
E. P. Clark
On the Properties of the Electron, p. 479
R. D. Kleeman
Manayunkia Speciosa (Leidy) in the Duluth Harbor, pp. 479-480
O. Lloyd Meehean
Some Additional Stories about Scientific Names, p. 480
Robert S. Breed


Reports
The National Research Council's Grants-In-Aid, pp. 480-481
Vernon Kellogg
Grants from the Elizabeth Thompson Science Fund, pp. 481-482


Scientific Apparatus and Laboratory Methods
Method for Concentrating and Sectioning Protozoa, pp. 482-483
Miriam Scott Lucas


Special Articles
Insular Biota and Dispersal Agents, pp. 483-484
Arthur Paul Jacot
Cycles in the Prenatal Growth of the Domestic Fowl, p. 484
Alexis L. Romanoff


Science News, pp. x+xii+xiv

Previous Issue: New Series, Vol. 70, No. 1819, Nov. 8, 1929
Next Issue: New Series, Vol. 70, No. 1821, Nov. 22, 1929



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