Henry Pickering Bowditch, Physiologist.

The Fiftieth Anniversary of the Founding of the Societies and Meetings: American Physiological Society: The Notre Dame Symposium on the Physics of the Henry Pickering Bowditch-Physiologist: PROUniverse and the Nature of Primordial Particles 487 FESSOR WALTER B. CANNON .....................471 Special Articles: Silas 'Weir Mitchell, 1829-1914: PROFEsoR A. J Immunization against Equine Encephalomyelitis CARlasO We he v . with Chick Embryo Vaccines: DR. J. W. BEARD C.ARLSON . ................................. 474 and OTHERS. Protoplasmic Streaming, Electric Potentials and Growth in Coleoptiles of Triticum Scientific Events: and Avena: DR. H. G. DU Buy and R. A. OLSON. Vienna and the International Congress of PsyThe Reliability of Principal Components: DR. chology; Organization of an Industrial Research IRVING LORGE and N. MORRISON ..................490 Institutte; The Field Museum of Natural History; Awards in the William Lowell Putnam MatheScience News ..................................10 matical Competition; Degrees Conferred by the _