Some New Aspects of Plant Nutrition.

Obituary: The Administration of Ferrous Iodide and Linoleic Ralph HIoffmann: E. H. Recent Deaths .... 288 Acid to Rats Deprived of Vitamin A: DRS. LUCILLE L. REED, LAFAYETTE B. MENDEL and HUBERT Scientific Events: BRADFORD VICKERY. Effect of Age and Sex on The Datid Dutnlap Observatory; NewBuaildng for Resistance of Daphnids to Mercuric Chloride: PROEntomology at tue University of C alif ornia; The FESSOR JOHN BREUKELMIAN ....................... 300 Jqsnior Science Clulbs Section of the American Institute; The Los Angeles Meeting of the American Science News ................................... 6 Mathematical Society ......................... 289 Scientiflc Notes and News ......................... 291 Discussion: The Fundamental Particles: PROFESSOR R. M. SCIENCE: A Weekly Journal devoted to the AdvanceLANGER. Light a Factor in Rancidity: DR. ment of Science, edited by J. MCKEEN CATTELL and pubGEORGE E. HOLm and GEORGE R. GREENBANK. An lished every Friday by Unusual Cotton Plant: PROFESSOR A. F. KIDDER. A Meteor in Wisconsin: PROpESSOR G. E. CULVER 294 THE SCIENCE PRESS Reports: New York City: Grand Central Terminal Doctorates Conferred in the Sciences by American New CenraaTrinal Universities, 1931-1932: DR. CLARENCE J. WEST Lancaster, Pa. Garrison, N. Y. and CALLIE HUJLL .. .................... ......... 296 Annual Subscription, $6.00 Single Copies, 15 Cts.