NOTE ON A METHOD OF DETERMINING THE DISTRIBUTION OF PORE SIZES IN A THE DESTRUCTION OF PHOSPHORESCENT ZINC SULFIDES BY ULTRA VIOLET LIGHT By Leonard B. Loeb and Lloyd Schmiedeskamp 202 ACOUSTIC PREssure DistriBUTIONS, CHIEfly in ReserVOIRS AND PIPES... AN APPARATUS FOR DETERMINATION OF THE GASES IN BLOOD AND OTHER SOLU- TIONS....... A REMEASUREMENT of the Radiation CONSTANT, h, BY MEANS OF X-RAYS... By William Duane, H. H. Palmer, and Chi-Sun Yeh 237 THE U-TUBE Absolute ELECTROMETER... ON THE CALCULATION OF THE X-RAY ABSORPTION FREQUENCIES OF THE CHEMICAL ON THE CALCULATION OF THE X-RAY ABSORPTION FREQUENCIES OF THE Chemical THE FURTHER EXTENSION OF THE ULTRA-VIOLET SPECTRUM AND THE PROGRESSION WITH ATOMIC NUMBER OF THE SPECTRA OF Light ElemenTS. By R. A. Millikan 289 MEASUREMENTS of the DEVIATION FROM OHM'S LAW IN METALS AT HIGH CURRENT THE GROWTH AND DECAY OF PHOTO-THERMIONIC CURRENTS FROM OXIDE COATED FILAMENTS. EXPERIMENTS ON THE ELECTRICAL CONDUCTION OF A HYDROGEN ALLOY.. By D. P. Smith 28 By A. W. C. Menzies and S. L. Wright 77 A DIFFERENTIAL THERMOMETER. ADAPTIVE RADIATION AND CLASSIFICATION OF THE PROBOSCIDEA.. By H. F. Osborn 231 By Waldemar Lindgren 249 THE VASCULAR ANATOMY OF NORMAL AND VARIANT SEEDLINGS OF Phaseolus vulgaris.. THE PRESENT STATUS OF THE LONG-CONTINUED PEDIGREE CULTURE OF Para- mecium Aurelia AT YALE UNIVERSITY.. NOVOCAINE AS A SUBSTITUTE FOR CURARE.. By J. F. Fulton, Jr. 114 By F. G. Benedict, E. L. Fox and Marion L. Baker 154 A PRELIMINARY NOTE ON THE RESULTS OF CROSSING CERTAIN VARIETIES OF By W. A. Setchell, T. H. Goodspeed and R. E. Clausen 50 AN APPARENT CASE OF NON-MENDELIAN INHERITANCE IN DATURA DUE TO A DISEASE.... CURRENT MAPS OF THE LOCATION OF THE MUTANT GENES OF DROSOPHILA ME- LANOGASTER...... THE INFLUEnce of Age ON FERTILITY IN SWINE.. VARIATION AND INHERITANCE IN SIZE IN TRYPANOSOMA LEWISI. I. LIFE-CYCLE IN THE RAT AND A STUDY OF SIZE AND VARIATION IN "PURE LINE" INFECTIONS THE GLOBE, A SIMPLE TRISOMIC MUTANT IN DATURA..By Albert F. Blakeslee 148 VARIATION AND INHERITANCE IN SIZE IN TRYPANOSOMA LEWISI. II. THE EFFECTS OF GROWING "PURE LINES" IN DIFFErent VerteBRATE AND INVERTEBRATE HOSTS AND A STUDY OF SIZE AND VARIATION IN INFECTIONS OCCURRING IN NATURE... LINKAGE VARIATION AND CHROMOSOME MAPS.. GENETICAL AND CYTOLOGICAL PROOF OF NON-DISJUNCTION OF THE FOURTH CHROMOSOME OF DROSOPHILA MELANOGASTER....By Calvin B. Bridges 186 THE BEHAVIOR OF HOMOLOGOUS CHROMOSOMES IN A TRIPLOID CANNA. NON-DISJUNCTION AND THE CHROMOSOME RELATIONSHIPS OF DROSOPHILA WILLIS- TONI.... THE PREDICTION OF ANNUAL EGG PRODUCTION FROM THE RECORDS OF LIMITED A CASE OF REARRANGEMENT OF GENES IN DROSOPHILA....By A. H. Sturtevant 235 NOTE ON MOVING EQUILIBRIA. By Alfred J. Lotka 168 AN UNIDENTIfied Base amONG THE HYDROLYTIC PRODUCTS OF GELATIN . By Donald D. Van Slyke and Alma Hiller 185 PHYSIOLOGY AND PATHOLOGY THE BASAL METABOLISM OF GIRLS 12 TO 17 YEARS OF AGE.... By F. G. Benedict, M. F. Hendry and M. L. Baker 10 THE EFFECT OF A VARIATION IN MILLING ON THE DIGESTIBILITY OF WHEAT FLOURS FEEDING EXPERIMENTS WITH MIXTURES OF FOODSTUFFS IN UNUSUAL PROPORTIONS By Thomas B. Osborne and Lafayette B. Mendel 157 SOME PHYSICAL CHARACTERISTICS OF THE EAR..... .....By John P. Minton 221 A METHOD FOR OBTAINING CONSTANTS FOR FORMULAS OF ORGANIC GROWTH...... By Simon Flexner and Harold L. Amoss 319 ANTHROPOLOGY CHRONOLOGY OF THE SAN JUAN AREA... By E. H. Morris 18 By A. V. Kidder and S. J. Guernsey 69 EDITORIAL BOARD The HOME SECRETARY and the FOREIGN SECRETARY of the ACADEMY The CHAIRMAN and the PERMANENT SECRETARY of the NATIONAL RESEARCH COUNCIL WILLIAM DUANE, '23 A. L. DAY, '22 CLARK WISSLER J. M. 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