CHAIRMAN: PROFESSOR CHRISTOPHER W. HALL, University of Minnesota. SPEAKER: DR. GEORGE F. BECKER, Geologist, U. S. Geological Survey. SECRETARY: PROFESSOR E. M. LEHNERTS, Minnesota State Normal School. SECTION B. GEOLOGY. (_Hall 14, September 21, 3 p. m._) CHAIRMAN: PROFESSOR T. C. CHAMBERLIN, University of Chicago. SPEAKERS: PRESIDENT CHARLES R. VAN HISE, University of Wisconsin. SECRETARY: PROFESSOR R. D. SALISBURY, University of Chicago. SECTION C. PALAEONTOLOGY. (_Hall 11, September 22, 10 a. m._) CHAIRMAN: PROFESSOR WILLIAM B. SCOTT, Princeton University. SPEAKERS: DR. A. S. WOODWARD, F.R.S., British Museum Of Natural History, London. PROFESSOR HENRY F. OSBORN, Columbia University. SECRETARY: DR. JOHN M. CLARKE, Albany, N. Y. SECTION D. PETROLOGY AND MINERALOGY. (_Hall 9, September 22, 3 p. m._) CHAIRMAN: DR. OLIVER C. FARRINGTON, Field Columbian Museum, Chicago. SPEAKER: PROFESSOR F. ZIRKEL, University of Leipzig. SECRETARY: SECTION E. PHYSIOGRAPHY. (_Hall 12, September 21, 10 a. m._) CHAIRMAN: MR. HENRY GANNETT, United States Geological Survey. SPEAKERS: PROFESSOR ALBRECHT PENCK, University of Vienna. PROFESSOR ISRAEL C. RUSSELL, University of Michigan. SECRETARY: DR. JOHN M. CLARKE, Albany, N. Y. SECTION F. GEOGRAPHY. (_Hall 11, September 22, 3 p. m._) CHAIRMAN: PROFESSOR ISRAEL C. RUSSELL, University of Michigan. SPEAKERS: DR. HUGH R. MILL, Director British Rainfall Organization, London. PROFESSOR H. YULE OLDHAM, Cambridge, England. SECRETARY: PROFESSOR R. D. SALISBURY, University of Chicago. SECTION G. OCEANOGRAPHY. (_Hall 8, September 21, 3 p. m._) CHAIRMAN: REAR-ADMIRAL JOHN R. BARTLETT, United States Navy. SPEAKERS: SIR JOHN MURRAY, K.C.B., F.R.S., Edinburgh. PROFESSOR K. MITSUKURI, University of Tokio. SECRETARY: SECTION H. COSMICAL PHYSICS. (_Hall 10, September 22, 10 a. m._) CHAIRMAN: PROFESSOR FRANCIS E. NIPHER, Washington University. SPEAKERS: PROFESSOR SVANTE ARRHENIUS, University of Stockholm, Stockholm. DR. ABBOTT L. ROTCH, Blue Hill Observatory. DR. L. A. BAUER, Washington, D. C. SECRETARY: DEPARTMENT 13--BIOLOGY (_Hall 2, September 20, 11.15 a. m._) CHAIRMAN: PROFESSOR WILLIAM G. FARLOW, Harvard University. SPEAKERS: PROFESSOR JOHN M. COULTER, University of Chicago. PROFESSOR JACQUES LOEB, University of California. SECTION A. PHYLOGENY. (_Hall 2, September 21, 3 p. m._) CHAIRMAN: PROFESSOR T. H. MORGAN, Columbia University. SPEAKERS: PROFESSOR HUGO DE VRIES, University of Amsterdam. PROFESSOR CHARLES O. WHITMAN, University of Chicago. SECRETARY: SECTION B. PLANT MORPHOLOGY. (_Hall 2, September 22, 10 a. m._)