CHAIRMAN: PROFESSOR WILLIAM TRELEASE, Washington University, St. Louis. SPEAKERS: PROFESSOR FREDERICK O. BOWER, University of Glasgow. PROFESSOR KARL F. GOEBEL, University of Munich. SECRETARY: PROFESSOR F. E. LLOYD, Columbia University. SECTION C. PLANT PHYSIOLOGY. (_Hall 4, September 22, 3 p. m._) CHAIRMAN: PROFESSOR CHARLES R. BARNES, University of Chicago. SPEAKERS: PROFESSOR JULIUS WIESNER, University of Vienna. PROFESSOR BENJAMIN M. DUGGAR, University of Missouri. SECRETARY: PROFESSOR F. C. NEWCOMB, University of Michigan. SECTION D. PLANT PATHOLOGY. (_Hall 7, September 23, 10 a. m._) CHAIRMAN: PROFESSOR CHAS. E. BESSEY, University of Nebraska. SPEAKERS: PROFESSOR JOSEPH C. ARTHUR, Purdue University. MERTON B. WAITE, U. S. Department of Agriculture. SECRETARY: DR. C. S. SHEAR, U. S. Department of Agriculture. SECTION E. ECOLOGY. (_Hall 7, September 23, 3 p. m._) CHAIRMAN: SPEAKERS: PROFESSOR OSKAR DRUDE, Kön. Technische Hochschule, Dresden. PROFESSOR BENJAMIN ROBINSON, Harvard University. SECRETARY: PROFESSOR F. E. CLEMENTS, University of Nebraska. SECTION F. BACTERIOLOGY. (_Hall 15, September 24, 10 a. m._) CHAIRMAN: PROFESSOR HAROLD C. ERNST, Harvard University. SPEAKERS: PROFESSOR EDWIN O. JORDAN, University of Chicago. PROFESSOR THEOBALD SMITH, Harvard University. SECRETARY: DR. P. H. HISS, JR., Columbia University. SECTION G. ANIMAL MORPHOLOGY. (_Hall 2, September 21, 10 a. m._) CHAIRMAN: DR. LELAND O. HOWARD, Department of Agriculture, Washington, D. C. SPEAKERS: PROFESSOR CHARLES B. DAVENPORT, University of Chicago. PROFESSOR ALFRED GIARD, the Sorbonne; Member of the Institute of France. SECRETARY: PROFESSOR C. H. HERRICK, Dennison University. SECTION H. EMBRYOLOGY. (_Hall 9, September 23, 3 p. m._) CHAIRMAN: PROFESSOR SIMON H. GAGE, Cornell University. SPEAKERS: PROFESSOR OSKAR HERTWIG, University of Berlin. PROFESSOR WILLIAM K. BROOKS, Johns Hopkins University. SECRETARY: PROFESSOR T. G. LEE, University of Minnesota. SECTION I. COMPARATIVE ANATOMY. (_Hall 2, September 24, 3 p. m._) CHAIRMAN: PROFESSOR JAMES P. MCMURRICH, University of Michigan. SPEAKERS: PROFESSOR WILLIAM E. RITTER, University of California. PROFESSOR YVES DELAGE, the Sorbonne; Member of the Institute of France. SECRETARY: PROFESSOR HENRY B. WARD, University of Nebraska. SECTION J. HUMAN ANATOMY. (_Hall 2, September 22, 3 p. m._) CHAIRMAN: PROFESSOR GEORGE A. PIERSOL, University of Pennsylvania. SPEAKERS: PROFESSOR WILHELM WALDEYER, University of Berlin. PROFESSOR H. H. DONALDSON, University of Chicago. SECRETARY: DR. R. J. TERRY, Washington University. SECTION K. PHYSIOLOGY. (_Hall 4, September 23, 10 a. m._)