Photons in Chemistry and Biology.

Photons in Chemistry and Biology: PROlESSOR FARScientific Apparatus and Laboratory Methods: RINGTON DANIELS ......................... 523 New Arrangement for Regulating Flow of Liquid Scientific Events: into a Culture Vessel: DR. CH. ZINZADZE .......... 540 The Electrostatic Generator at the Massachusetts Institute of Technology; Symposium on Ionic Special Articles: Physics at Cornell University; Meetings of Sigma A Second-generation Captive-born Chimpanzee: Xi; Award to Dr. Kraus of the Willard Gibbs DR. ROBERT M. YERKES. A Gene for Control of Medal; The Retirement of Professor Ernest MerInterstitial Localization of Chiasmata in Allium ritt. Recent Deaths .......................... 528 fistulosum L.: DR. S. L. EMSWELLER and DR. H. A. JONES. How Long Do Roots of Grasses Live?: Scientific Notes and NewsD.R. DR . LAURENCE A. STODDART.................. 542 Discussion: A Kitchen Middens with Bones of Extinct Animals Science News................................... 6 in the Upper Lakes Area: PROFESSOR SAMUEL EDDY and PROFESsoR ALBERT ERNEST JENKS. Studies of Crystalline Vitamin B1 VII: ROBERT R. WILLIAMS, ROBERT E. WATERMAN and JOHN C. SCIENCE: A Weekly Journal devoted to the AdvanceKEEszTESY. A Phytosterol and Phytosterolin ment of Science, edited by J. MCKEEN CATTELL and pubfrom the Sweet Potato: DR. M. B. MATLACx. lished every Friday by The Application of Artificially Ionized Air: THE SCIENCE PRESS PROFESSOR ALEXIS L. ROMANOFF. Experimental Adaptation of Freshwater Ciliates to Sea Water: New York City Grand Central Terminal PROFESSOR JOHN A. FRISCH. Distribution of SepaLancaster, Pa. Garrison, N. Y. rates of Certain Papers by the late Bashford Dean: E. W. GuIJ n ...........................535 Annual Subscription, $6.00 Single Copies, 15 Cts.