SPEAKER: PROFESSOR ROBERT S. WOODWARD, Columbia University.

DEPARTMENT 9--PHYSICS (_Hall 6, September 20, 2 p. m._)

CHAIRMAN: PROFESSOR HENRY CREW, Northwestern University.

SPEAKERS: PROFESSOR EDWARD L. NICHOLS, Cornell University.

PROFESSOR CARL BARUS, Brown University.

SECTION A. PHYSICS OF MATTER. (_Hall 11, September 23, 10 a. m._)

CHAIRMAN: PROFESSOR SAMUEL W. STRATTON, Director of The National Bureau of Standards, Washington.

SPEAKERS: PROFESSOR ARTHUR L. KIMBALL, Amherst College.

PROFESSOR FRANCIS E. NIPHER, Washington University.

SECRETARY: PROFESSOR R. A. MILLIKEN, University of Chicago.

SECTION B. PHYSICS OF ETHER. (_Hall 11, September 23, 3 p. m._)

CHAIRMAN: PROFESSOR HENRY CREW, Northwestern University.

SPEAKER: PROFESSOR DEWITT B. BRACE, University of Nebraska.

SECRETARY: PROFESSOR AUGUSTUS TROWBRIDGE, University of Wisconsin.

SECTION C. PHYSICS OF THE ELECTRON. (_Hall 5, September 22, 3 p. m._)

CHAIRMAN: PROFESSOR A. G. WEBSTERr, Clark University.

SPEAKERS: PROFESSOR P. LANGEVIN, College de France.

PROFESSOR ERNEST RUTHERFURD, McGill University, Montreal.

SECRETARY: PROFESSOR W. J. HUMPHREYS, University of Virginia.

DEPARTMENT 10--CHEMISTRY (_Hall 5, September 20, 4.15 p. m._)

CHAIRMAN: PROFESSOR JAMES M. CRAFTS, Ma.s.sachusetts Inst.i.tute of Technology.

SPEAKERS: PROFESSOR JOHN U. NEF, University of Chicago.

PROFESSOR FRANK W. CLARKE, Chief Chemist, U. S. Geological Survey.

SECTION A. INORGANIC CHEMISTRY. (_Hall 16, September 21, 10 a. m._)

CHAIRMAN: PROFESSOR JOHN W. MALLET, University of Virginia.

SPEAKERS: PROFESSOR HENRI MOISSAN, the Sorbonne; Member of the Inst.i.tute of France.

SIR WILLIAM RAMSAY, K.C.B., Royal Inst.i.tution, London.

SECRETARY: PROFESSOR WILLIAM L. DUDLEY, Vanderbilt University.

SECTION B. ORGANIC CHEMISTRY. (_Hall 16, September 21, 3 p. m._)

CHAIRMAN: PROFESSOR ALBERT B. PRESCOTT, University of Michigan.

SPEAKERS: PROFESSOR JULIUS STIEGLITZ, University of Chicago.

PROFESSOR WILLIAM A. NOYES, National Bureau of Standards.

SECRETARY:

SECTION C. PHYSICAL CHEMISTRY. (_Hall 16, September 22, 10 a. m._)

CHAIRMAN: PROFESSOR WILDER D. BANCROFT, Cornell University.

SPEAKERS: PROFESSOR J. H. VAN T'HOFF, University of Berlin.

PROFESSOR ARTHUR A. NOYES, Ma.s.sachusetts Inst.i.tute of Technology.

SECRETARY: MR. W. R. WHITNEY, Schenectady, N. Y.

SECTION D. PHYSIOLOGICAL CHEMISTRY. (_Hall 16, September 22, 3 p. m._)

CHAIRMAN: PROFESSOR WILDER O. At.w.a.tER, Wesleyan University.

SPEAKERS: PROFESSOR O. COHNHEIM, University of Heidelberg.

PROFESSOR RUSSELL H. CHITTENDEN, Yale University.

SECRETARY: DR. C. L. ALSBERG, Harvard University.

DEPARTMENT 11--ASTRONOMY (_Hall 8, September 20, 4.15 p. m._)

CHAIRMAN: PROFESSOR GEORGE C. COMSTOCK, Director of the Observatory, Madison, Wisconsin.

SPEAKERS: PROFESSOR LEWIS BOSS, Director of Dudley Observatory.

PROFESSOR EDWARD C. PICKERING, Director of Harvard Observatory.

SECTION A. ASTROMETRY. (_Hall 9, September 21, 10 a. m._)

CHAIRMAN: PROFESSOR ORMOND STONE, University of Virginia.

SPEAKERS: DR. OSKAR BACKLUND, Director of the Observatory, Pulkowa, Russia.

PROFESSOR JOHN C. KAPTEYN, University of Groningen, Holland.

SECRETARY: PROFESSOR W. S. EICHELBERGER, U. S. Naval Observatory.

SECTION B. ASTROPHYSICS. (_Hall 9, September 21, 3 p. m._)

CHAIRMAN: PROFESSOR GEORGE E. HALE, Director of the Yerkes Observatory.

SPEAKERS: PROFESSOR HERBERT H. TURNER, F.R.S., University of Oxford.

PROFESSOR WILLIAM W. CAMPBELL, Director of The Lick Observatory, Mt. Hamilton, California.

SECRETARY: MR. W. S. ADAMS, Yerkes Observatory.

DEPARTMENT 12--SCIENCES OF THE EARTH (_Hall 3, September 20, 11.15 a. m._)

CHAIRMAN: DR. G. K. GILBERT, U. S. Geological Survey.

SPEAKERS: PROFESSOR THOMAS C. CHAMBERLIN, University of Chicago.