TABLE OF CONTENTS 



VOLUME VIII 

 ASTRONOMY 



Fundamental Conceptions and Methods in Astronomical Science . 360 

 BY PROP. LEWIS Boss, LL.D. 



The Light of the Stars 374 



BY PROF. EDWARD CHARLES PICKERING, LL.D. 



ASTROMETRY. 



The Development of Celestial Mechanics during the Nineteenth Century 387 

 BY DR. OSKAR BACKLUND, Ph.D., D.Sc. 



Statistical Methods in Stellar Astronomy . . . . 396 



BY PROF. JACOBUS CORNELIUS KAPTEYN, Ph.D. 



ASTROPHYSICS. 



The Relations of Photography to Astrophysics .... 429 

 BY PROF. HERBERT HALL TURNER, D.Sc., F.E.S. 



The Problems of Astrophysics ....... 446 



BY PROF. WILLIAM WALLACE CAMPBELL, LL.D., D.Sc. 



Bibliography: Department of Astronomy . . . . , . 471 

 SCIENCES OF THE EAETH 



The Methods of the Earth- Sciences . . . . . .477 



BY PROF. THOMAS CHROWDER CHAMBERLIN, Ph.D., LL.D. 



The Relations of the Earth-Sciences in View of their Progress in the 

 Nineteenth Century ......... 488 



BY PROF. WILLIAM MORRIS DAVIS, S.B., M.E. 



GEOPHYSICS. 



Present Problems of Geophysics . ' . . . . . 508 



BY PROF. GEORGE FERDINAND BECKER, Ph.D. 



GEOLOGY. 



The Problems of Geology ...!.... 525 

 BY PRESIDENT CHARLES RICHARD VAN HISE, LL.D. 



