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Science, New Series, Vol. 83, No. 2153, Apr. 3, 1936


Previous Issue: New Series, Vol. 83, No. 2152, Mar. 27, 1936
Next Issue: New Series, Vol. 83, No. 2154, Apr. 10, 1936


Front Matter (3 pp.)
The Harvard Tercentenary Conference of Arts and Sciences, pp. 311-313
A Stratigraphic View of Geography, pp. 313-317
Eugene Van Cleef


Obituary
George Williamson, 1857-1936, pp. 317-318
Gordon Gunter
Recent Deaths, p. 318


Scientific Events
Committee on Forestry of the National Research Council of Canada, pp. 318-319
The Federal Water Conservation Program, p. 319
Appointment of Dr. James T. Jardine as Director of Research of the U. S. Department of Agriculture, pp. 319-320
Awards of the Medals of the Franklin Institute, pp. 320-321


Scientific Notes and News, pp. 321-324


Discussion
Observations on the Cultivation of Poliomyelitis Virus, pp. 324-325
Frederick Eberson
The Vitamin C Content of Apples and Its Relation to Human Welfare, pp. 325-327
W. Franklin Dove; Elizabeth Murphy
Determination of the Chloroplast Pigments of Plants, p. 327
A. E. Murneek
Vertebrate Localities in South Park, Colorado, pp. 327-328
J. T. Stark; J. Harlan Johnson; C. H. Behre; W. E. Powers; A. L. Howland; Don B. Gould
Occurrence of the Malone and Torcer Faunas at the Base of the Arizona Comanchean, p. 328
A. A. Stoyanow


Scientific Books
Anatomy of Vertebrates, pp. 328-329
The Microscopic Anatomy of Vertebrates
G. G. Scott; J. I. Kendall
Review author[s]: L. B. Arey
Zoology, pp. 329-330
An Outline of General Biology
Gordon Alexander
An Introduction to Biology
Edward Loranus Rice
Laboratory Guide in Animal Biology
Robert H. Wolcott; Eugene F. Powell
Review author[s]: A. S. Pearse


Reports
Awards of the Ella Sachs Plotz Foundation, p. 330


Special Articles
The Ability of Rats to Discriminate between Diets of Varying Degrees of Toxicity, pp. 330-332
Kurt W. Franke; Van R. Potter
Submerged Valleys on Continental Slopes and Changes of Sea Level, pp. 332-334
H. H. Hess; Paul MacClintock


Scientific Apparatus and Laboratory Methods
Measurement of the Area of Attached and Detached Leaves, pp. 334-336
John W. Mitchell
A Simple Quartz Mercury Arc, p. 336
A. J. Allen


Books Received, p. 336
Science News, pp. 8a+10a+11a
Back Matter (1 p.)

Previous Issue: New Series, Vol. 83, No. 2152, Mar. 27, 1936
Next Issue: New Series, Vol. 83, No. 2154, Apr. 10, 1936



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