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Science, New Series, Vol. 61, No. 1569, Jan. 23, 1925


Previous Issue: New Series, Vol. 61, No. 1568, Jan. 16, 1925
Next Issue: New Series, Vol. 61, No. 1570, Jan. 30, 1925


Front Matter (4 pp.)


The American Association for the Advancement of Science
The Origin of the Cycads, pp. 73-77
Charles J. Chamberlain
"Age and Area" in Relation to Extinction, pp. 77-79
S. J. Holmes


Alfred Hulse Brooks, pp. 80-81
George Otis Smith


Scientific Events
Applied Science at the University of Brussels, p. 81
Annual Exhibition at the Carnegie Institution of Washington, pp. 81-82
Research Prize at the University of Virginia, p. 82
The Formation of the American Society of Parasitologists, p. 82
W. W. Cort
Appalachian Forest Research Council, pp. 82-83


Scientific Notes and News, pp. 83-86
University and Educational Notes, pp. 86-87


Discussion and Correspondence
The Population of Canada, pp. 87-89
Edwin B. Wilson
Haploid Males in Paracopidosomopsis, p. 89
J. T. Patterson; G. W. D. Hamlett
An Anatomical Spelling Match, pp. 89-90
H. B. Latimer
How Many Figures Are Significant?, p. 90
John Satterly


Laboratory Apparatus and Methods
Staining Paramecium in the Class-Room, p. 90
C. R. Halter


Special Articles
Tryparsamide Treatment of African Sleeping Sickness, pp. 90-92
Louise Pearce
The Pancreatic Response to Carbohydrate Ingestion, pp. 92-93
Elmer L. Sevringhaus; Margaret E. Smith
The Effect of Fluorine as Sodium Fluoride on the Growth and Reproduction of Albino Rats, pp. 93-94
J. A. Schulz; Alvin R. Lamb


The Indiana Academy of Science, pp. 95-96
J. J. Davis

Science News, pp. x+xii+xiv

Previous Issue: New Series, Vol. 61, No. 1568, Jan. 16, 1925
Next Issue: New Series, Vol. 61, No. 1570, Jan. 30, 1925



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