Some Obstacles in the Path towards an Optimum Diet.

Researchin Wartime: PRoFEssoR J. H. SImoNS ............ 390 WILFRED H. OSGOOD ............ .............................. 403 Special Articles: Obituary: Isolation of the Antianemia Factor (Vitamin B') Edmund Smith Conklin: DRs. RoBERT H. SEAsHORE, in Crsalie amtrmnier u.J .cpFNR R. C. DAVIS and J. R. KAANTOR Recent Deaths 393 Crystallin e Form from Liver: Da.J.J. P.. Scientific Events: Swedish Forest Products; Industrial Research LabScientific Apparatus and Laboratory Methods: oratory of the University of Rochester; Bare ChemQuantitative Micro-Estimation of Antibodies in the icals; Award of the Nicholas Appert Medal to Dr. Sera of Man and Other Animals: DR. MICHAEL Prescott; Conference on Physics; Pacific Division HEIDELBERGER and CATHERINE F. C. MACPHERSON 405 of the American Association for the Advancement of Science .................... 394 Science News .10