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Science, New Series, Vol. 81, No. 2113, Jun. 28, 1935


Previous Issue: New Series, Vol. 81, No. 2112, Jun. 21, 1935
Next Issue: New Series, Vol. 82, No. 2114, Jul. 5, 1935


Front Matter (1 p.)
The Thermionic Valve in Scientific Research, pp. 625-628
Ambrose Fleming

The Electronic Theories of Lewis and Kossel, pp. 628-629
William A. Noyes


Obituary
Lucian W. Chaney, pp. 629-630
Franz F. Exner
Samuel Henry Essary, p. 630
Ludwig Stolz Mayer
Recent Deaths, p. 631


Scientific Events
Oxford University Observatory, p. 631
The David Dunlap Observatory, pp. 631-632
The Harvard Mineralogical Museum, p. 632
The Cornell Meeting of the American Institute of Electrical Engineers, pp. 632-633
Honorary Degrees Conferred by Harvard University, p. 633


Scientific Notes and News, pp. 633-636


Discussion
The New Active Principle of Ergot, pp. 636-639
Marvin R. Thompson
The Cross-Inoculation of Bacterial-Plant Group of Cicer, p. 639
M. S. Raju
Vitamins?, p. 639
Andrew Moldavan
Cytogenetic Notes on Sphaeralcea and Malvastrum, pp. 639-640
J. M. Webber
Scientific Men and the Newspapers, p. 640
Waldemar Kaempffert


Scientific Books
Quantum Mechanics, pp. 640-641
Principles of Quantum Mechanics
P. A. M. Dirac
Review author[s]: Paul S. Epstein
Garden Plants, pp. 641-642
The Genetics of Garden Plants
M. Crane; W.J.C. Lawrence
Review author[s]: Alfred E. Clarke


Scientific Apparatus and Laboratory Methods
Sand and Water Paradox, pp. 642-643
Isay A. Balinkin


Special Articles
Molecular Rearrangements of Sulfanilides, pp. 643-644
Treat B. Johnson; Maurice L. Moore
Isolation of a Crystalline Protein Possessing the Properties of Tobacco-Mosaic Virus, pp. 644-645
W. M. Stanley
Action Potentials during High and Low Frequency Stimulation of Medullated Nerve, pp. 645-646
McKeen Cattell; Harry Grundfest


Books Received, p. 646
Science News, pp. 5a+6a

Previous Issue: New Series, Vol. 81, No. 2112, Jun. 21, 1935
Next Issue: New Series, Vol. 82, No. 2114, Jul. 5, 1935



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