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Science, New Series, Vol. 69, No. 1789, Apr. 12, 1929


Previous Issue: New Series, Vol. 69, No. 1788, Apr. 5, 1929
Next Issue: New Series, Vol. 69, No. 1790, Apr. 19, 1929


Front Matter (5 pp.)
The Work of Thomas Burr Osborne (1859-1929), pp. 385-389
Hubert B. Vickery; Lafayette B. Mendel

The Objectives of Undergraduate Courses in Physics for Engineering Students, pp. 389-392
William S. Franklin


Scientific Events
Increase of National Forest Units, pp. 392-393
Institute of Tropical Medicine at the University of California, p. 393
Census of Migratory Waterfowl, pp. 393-394
Anthropological Scholarships, p. 394
Fay-Cooper Cole; R. B. Dixon; A. V. Kidder
Summer Meetings of the Botanical Society of America, p. 395
L. W. Sharp


Scientific Notes and News, pp. 395-398
University and Educational Notes, p. 399


Discussion
Criteria of Hybridity, pp. 399-400
C. Leonard Huskins
Observations on the Synchronous Flashing of Fireflies in Siam, pp. 400-401
T. F. Morrison
The Keeping Quality of Hens' Eggs, p. 401
O. S. Rask
Isopleth, p. 402
Harold S. Palmer
General Factors in a Table of Intercorrelations, p. 402
M. Rosa McDonough


Quotations
The Elgin Botanic Garden, pp. 402-403


Scientific Books
----------------, p. 403
The Fishes of Oceania
Henry W. Fowler
Review author[s]: S. C. B.


Scientific Apparatus and Laboratory Methods
A Three-Dimensional Thermo-Isopleth, pp. 404-405
Guy-Harold Smith
A Method for Purification of Extracts Containing the Growth-Promoting Principle of the Anterior Hypophysis, pp. 405-406
Harold M. Teel


Special Articles
The First Spectrum of Xenon, p. 406
William F. Meggers; T. L. DE Bruin; C. J. Humphreys
Development of the Mouse Adrenal, pp. 406-407
E. Howard Miller
Structure of Plant Compounds and Solubility, pp. 407-408
R. H. Carr


Science News, pp. x+xii+xiv+xvi

Previous Issue: New Series, Vol. 69, No. 1788, Apr. 5, 1929
Next Issue: New Series, Vol. 69, No. 1790, Apr. 19, 1929



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