PROFESSOR WILLIAM M. DAVIS, Harvard University.

SECTION A. GEOPHYSICS. (_Hall 14, September 21, 10 a. m._)

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._)

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.