Publication Office: Williams & Wilkins Company, Baltimore Home Office of the Academy: Washington, D. C. MINUTES OF MEETINGS OF THE EXECUTIVE BOARD.........50, 91, 299, 360, 462, 532, 603 MINUTES OF Joint Meetings OF THE EXECUTIVE BOARD WITH THE COUNCIL OF THE ORGANIZATION OF THE NATIONAL RESEARCH COUNCIL. EXECUTIVE ORDER ISSUED BY THE PRESIDENT OF THE UNITED STATES. ORGANIZATION OF DIVISIONS OF SCIENCE AND TECHNOLOGY. 184 188 313 447, 459, 469, 528, 599 .By Henry Norris Russell 391 A THEOREM ON POWER SERIES, WITH AN APPLICATION TO CONFORMAL MAPPING..... TABLES OF THE ZONAL SPHERICAL HARMONIC OF THE SECOND KIND Qı(z) AND Qı′(3).... By A. G. Webster and Willard Fisher 79 ON THE REAL FOLDS OF ABELIAN VARIETIES. COVARIANTS OF BINARY MODULAR GROUPS. THE GENERAL SOLUTION OF THE INDETERMINATE EQUATION: Ax + By + Cz+. ON A CERTAIN CLASS OF RATIONAL RULED SURFACES. ON THE TWIST IN CONFORMED MAPPING....... GROUPS INVOLVING ONLY TWO OPERATORS WHICH ARE SQUARES.. PERTURBATIONS AND TABLES OF THE MINOR PLANETS DISCOVERED BY JAMES C. WATSON By Armin O. Leuschner 67 By Adriaan van Maanen 225 ON THE USE OF THE SPECTROSCOPIC METHOD FOR DETERMINING THE PARALLAXES OF PAGE RELATION OF COLOR TO INTRINSIC LUMINOSITY IN STARS OF THE SAME SPECTRAL TYPE THE MOTIONS IN SPACE OF SOME STARS OF HIGH RADIAL VELOCITY... By W. S. Adams and A. H. Joy 239 DEVIATIONS OF THE SUN'S GENERAL MAGNETIC FIELD FROM THAT OF A UNIFORMLY SYSTEM..... .By C. D. Perrine 371 MOUNT WILSON, CALIFORNIA, AND CALAMA, CHILE.. .By C. G. Abbot 383 ON THE SPECTRAL LINES OF A PULSATING STAR By Harlow Shapley and Seth B. Nicholson 417 NOTE ON A CONTACT LEVER, USING ACHROMATIC DISPLACEMENT FRINGES By Carl Barus 39 INTERFERENTIAL CONTACT LEVER EXPERIMENTS RELATING TO THE ELASTICS OF SMALL NOTE ON THE SELF-ADJUSTING INTERFEROMETER IN RELATION TO THE ACHROMATIC By A. G. Webster and L. T. E. Thompson 259 ON THE ANGLE OF REPOSE OF WET SAND. THE ELONGATION DUE TO MAGNETIZATION. ACOUSTICAL IMPEDANCE AND THE THEORY OF HORNS AND OF THE PHONOGRAPH. ON THE POSSIBLE FORM OF THE EQUATION OF STATE OF POWDER GASES BY A. G. Webster 286 THE RELATIVE ADSORPTION OF MIXTURES OF OXYGEN AND NITROGEN IN COCOANUT SHELL CHARCOAL. VARIATIONS, DUE TO HEAT TREATMENT, IN THE RATE OF ADSORPTION OF AIR BY COCOANUT SHELL CHARCOAL.. THE INTERFEROMETRY OF RAPID VIBRATIONS CHIEFLY IN RELATION TO TELEPHONE PAGE MEANS OF MEASURING THE SPEED OF PROJECTILES IN FLIGHT. A VAPOR-FREE VACUUM SEAL. .... .By C. G. Abbot 388 By A. H. Pfund 521 THE DISPLACEMENT OF THE GRAVITATING NEEDLE IN ITS DEPENDENCE ON ATMO- SPHERIC TEMPERATURES. RADIATIONLESS ORBITS.... ..By Carl Barus 547 THE EFFECT UPON THE ATOM OF THE PASSAGE OF AN ALPHA RAY THROUGH IT By Frank Wigglesworth Clarke and George Steiger 6 .By J. B. Ferguson and H. E. Merwin 16 THE TERNARY SYSTEM CaO-MgO-SiO2.. ON SOME METALLIC DERIVATIVES OF ETHYL THIOGLYCOLLATE By Charles A. Rouiller. 145 AN ELECTROMAGNETIC HYPOTHESIS OF THE KINETICS OF HETEROGENEOUS EQUILIB- RIUM, AND OF THE STRUCTURE OF LIQUIDS. HYDROGEN OVERVOLTAGE...... THE STRUCTURE OF ATOMS AND THE OCTET THEORY OF VALENCE. . By Irving Langmuir 252 SOME APPLICATIONS OF THE VARIATION OF HYDROGEN OVERVOLTAGE WITH THE PRES- STUDIES OF THE CONSTITUTION OF STEEL.... INFLUENCE OF IONS ON THE ELECTRIFICATION AND RATE OF DIFFUSION OF WATER THE CHANGE OF MOLECULAR KINETIC ENERGY INTO MOLECULAR POTENTIAL ENERGY: THE ENTROPY PRINCIPLE AND MOLECULAR ASSOCIATION... By William D. Harkins 539 NEW MEASUREMENTS OF THE VAPOR PRESSURE OF MERCURY...By Alan W. C. Menzies 558 COHESION, INTERNAL PRESSURE, ADHESION, TENSILE STRENGTH, TENSILE ENERGY, AND MOLECULAR ATTRACTION... THE ADHESION BETWEEN MERCURY, WATER, AND ORGANIC SUBSTANCES, AND THE GEOLOGY AND PALEONTOLOGY ON SOME FUNDAMENTALS OF PRE-CAMBRIAN PALEO-GEOGRAPHY. By Rudolph Ruedemann THE PERCENTAGE NUMBER OF METEORITE FALLS AND FINDS CONSIDERED WITH REF- ERENCE TO THEIR VARYING BASICITY. FALKLANDIA... SEVENTEEN SKELETONS OF MOROPUS; PROBABLE HABITS OF THIS ANIMAL. By Henry Fairfield Osborn 250 PALEMASTODON, THE ANCESTORS OF THE LONG-Jawed MastodoNS ONLY.. DISCOIDAL STRUCTURE OF THE LITHOSPHERE By Henry Fairfield Osborn 265 BOTANY By Erwin F. Smith 36 THE CAUSE OF PROLIFERATION IN BEGONIA PHYLLOMANIACA. FUCUS SPORES AND RHIZOIDS...... By Annie May Hurd 201 PHENOMENA OF CELL DIVISION IN THE CAMBIUM OF ARBORESCENT GYMNOSPERMS AND |