62 SPEAKERS AND CHAIRMEN 



SECTION D. PHYSIOLOGICAL CHEMISTRY. (Hall 16, September 22, 

 3 p. TO.) 



CHAIRMAN: PROFESSOR WILBUR O. AT WATER, Wesleyan Univers- 

 ity. 



SPEAKERS: PROFESSOR O. COHNHEIM, University of Heidelberg. 

 PROFESSOR RUSSELL H. CHITTENDEN, Yale Univers- 

 ity. 



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



DEPARTMENT 11 - - ASTRONOMY 



(Hall 8, September 20, 4.15 p. TO.) 



CHAIRMAN: PROFESSOR GEORGE C. COMSTOCK, Director of the 

 Observatory, Madison, Wisconsin. 



SPEAKERS: PROFESSOR LEWIS Boss, Director of Dudley Observa- 

 tory. 



PROFESSOR EDWARD C. PICKERING, Director of Har- 

 vard Observatory. 



SECTION A. ASTROMETRY. (Hall 9, September 21, 10 a. TO.) 



CHAIRMAN: PROFESSOR ORMOND STONE, University of Virginia. 



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



Pulkowa, Russia. 



PROFESSOR JOHN C. KAPTEYN, University of Gronin- 

 gen, Holland. 



SECRETARY: PROFESSOR W. S. EICHELBERGER, U. S. Naval Observ- 

 atory. 



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., Univers- 

 ity 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. TO.) 



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

 SPEAKERS: PROFESSOR THOMAS C. CHAMBERLIN, University of 



Chicago. 

 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. 



