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, MINUTES OF Joint Meetings oF THE EXECUTIVE BOARD WITH THE COUNCIL OF THE 184 188 313 447, 459, 469, 528, 599 316 ORGANIZATION OF THE NATIONAL RESEARCH COUNCIL... EXECUTIVE ORDER ISSUED BY THE PRESIDENT OF THE UNITED STATES. ORGANIZATION OF DIVISIONS OF SCIENCE AND TECHNOLOGY. .By Henry Norris Russell 391 Tables of the ZONAL SPHERICAL HARMONIC OF THE SECOND KIND Qı(z) AND Qı′(z).... 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 |