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Science, New Series, Vol. 61, No. 1580, Apr. 10, 1925


Previous Issue: New Series, Vol. 61, No. 1579, Apr. 3, 1925
Next Issue: New Series, Vol. 61, No. 1581, Apr. 17, 1925


Front Matter (4 pp.)
Experimentum Periculosum; Judicium Difficile, pp. 373-379
Harvey Cushing

The Causes and Prediction of Earthquakes, pp. 379-380
William Bowie

First Award of the Penrose Medal, pp. 380-382


Scientific Events
The British Anthropological Institute, p. 382
The Administration of Patents by Columbia University, pp. 382-383
Geology and Physiography at the Northwest Scientific Association, p. 383
T. Large
The Madrid International Geological Congress, pp. 383-384
The Joseph Leidy Memorial Award, p. 384


Scientific Notes and News, pp. 384-388
University and Educational Notes, p. 388


Discussion and Correspondence
On the Decomposition of H2O2, pp. 388-389
Wheeler P. Davey
Termites in Buildings, p. 389
T. E. Snyder
Editorial Service, pp. 389-391
Gordon S. Fulcher
The Fresh-Water Sponge, Spongilla lacustris Linn., in Massachusetts, p. 391
W. H. Cole; D. Potter
A Natural Seismograph, pp. 391-392
John M. Clarke


Scientific Apparatus and Laboratory Methods
A Method of Demonstrating Acidity of Food Vacuoles in Paramecium, p. 392
Arthur N. Bragg; Harold Hulpieu
Micro Slide Rings, p. 392
E. C. O'Roke


Special Articles
The Effect of Polarized Light on the Growth of Luminous Bacteria, pp. 392-393
T. F. Morrison
The Non-Nucleated Cellular Elements of the Blood, pp. 393-396
Victor E. Emmel


The Illinois State Academy of Science, p. 396
C. Frank Phipps

The Oklahoma Academy of Science, pp. 396-397
A. Richards


The American Association for the Advancement of Science
Report of the Committee on the Philological Sciences, pp. 397-398
W. A. Oldfather


Science News, pp. x+xii+xiv

Previous Issue: New Series, Vol. 61, No. 1579, Apr. 3, 1925
Next Issue: New Series, Vol. 61, No. 1581, Apr. 17, 1925



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