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Science, New Series, Vol. 71, No. 1849, Jun. 6, 1930


Previous Issue: New Series, Vol. 71, No. 1848, May 30, 1930
Next Issue: New Series, Vol. 71, No. 1850, Jun. 13, 1930


Front Matter (3 pp.)
The Symmetry of Time in Physics, pp. 569-577
Gilbert N. Lewis


Obituary
Shosaburo Watasé, pp. 577-578
F. R. Lillie; Shigeo Yamanouchi
Recent Deaths, p. 579


Scientific Events
The Conversaziones of the Royal Society, p. 579
Research Building of the Mellon Institute, pp. 579-580
Symposium on the Kidney in Health and Disease, p. 580
The Pacific Division of the American Association, pp. 580-581


Scientific Notes and News, pp. 581-585


Discussion
How Old is the Pleistocene?, pp. 585-586
James A. B. Scherer
The Future of Taxonomy, p. 586
T. D. A. Cockerell
Inactivity of Chicory, p. 586
Chapman Reynolds
Can a Catfish Count?, pp. 586-587
Ida Mellen


Scientific Apparatus and Laboratory Methods
Recording Cerebral Action Currents, p. 587
S. H. Bartley; E. B. Newman
A Convenient Aid in Balancing Centrifuge Tubes, p. 587
H. W. Estill


The American Association for the Advancement of Science
The Regular Spring Meeting of the Executive Committee, pp. 588-589
Burton E. Livingston


Special Articles
The Structure of Glutathione, pp. 589-590
Ben H. Nicolet
Transmission Changes in Ultra-Violet Glasses during High Temperature Exposure to Light, p. 590
C. C. Nitchie; F. C. Schmutz


Books Received, p. 590
Science News, pp. x+xii

Previous Issue: New Series, Vol. 71, No. 1848, May 30, 1930
Next Issue: New Series, Vol. 71, No. 1850, Jun. 13, 1930



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