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Science, New Series, Vol. 59, No. 1538, Jun. 20, 1924


Previous Issue: New Series, Vol. 59, No. 1537, Jun. 13, 1924
Next Issue: New Series, Vol. 59, No. 1539, Jun. 27, 1924


Front Matter (4 pp.)
Seed-Borne Parasites--A General Consideration of the Problem, pp. 539-546
Clayton Roberts Orton

The American Psychological Association, pp. 546-548
Lewis M. Terman


Scientific Events
Oxford Expedition to the Arctic, p. 548
Resolution on Destruction of Vermin and Predatory Animals, p. 548
Hartley H. T. Jackson
The Yellowstone School of Natural History and Biological Station, pp. 548-549
Frank Thone; R. B. Harvey; Wm. J. Cribbs; H. S. Conard
The American Chemical Prize, pp. 549-550
Charles F. Chandler; Ira Remsen; Theodore W. Richards; Francis P. Venable; Edgar F. Smith
The Seventeenth Annual Conference on the Weights and Measures of the United States, p. 550


Scientific Notes and News, pp. 550-553
University and Educational Notes, p. 553


Discussion and Correspondence
The Bones of Rafinesque, pp. 553-554
David Starr Jordan
Naming and Exact Naming, p. 554
Henry H. Donaldson
The Scientist and an International Language, pp. 554-555
Roland G. Kent
Insects in the California Tar Traps, p. 555
G. Dallas Hanna


Scientific Books
----------------, pp. 555-556
Biomathematics, Being the Principles of Mathematics for Students of Biological Science
W. M. Feldman
Review author[s]: Edwin B. Wilson


Laboratory Apparatus and Methods
Certified Safranin, pp. 556-557
H. J. Conn
Staining Woody Tissues with Safranin and Picro-Anilin Blue, pp. 557-558
R. W. Smith


Special Articles
The Coincident Production of Dextral and Sinistral Young in the Land-Gasteropod Partula, pp. 558-559
Henry E. Crampton


The American Chemical Society
Division of Inorganic and Physical Chemistry, pp. 559-562
Graham Edgar


Science News, pp. x+xii+xiv

Previous Issue: New Series, Vol. 59, No. 1537, Jun. 13, 1924
Next Issue: New Series, Vol. 59, No. 1539, Jun. 27, 1924



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