Geologic Research as Illustrated by Photography, G. K. Gilbert, 

 N. H. Darton, and F. L. Ransome. 



April 3^ I goo. 

 Photography applied to Sidereal Astronomy, Dr. H. S. Pritchett. 

 Photography in Astrophysics, Prof. J. G. Hagen. 

 Photography as used in Eclipse Observations, Prof. S. J. Brown. 

 Photography in Physics, Prof. Frank H. Bigelow. 



April i8^ I goo. 

 Photography in Anthropology, W. H. Holmes. 

 Photography in Physical Anthropology, W J McGee. 

 Photography in History and Literature, Dr. Cyrus Abler. 



May z, I goo. 

 The Applications of the Kromskop, Frederick E. Ives. 

 The Applications of the Phantascope, E. Francis Jenkins. 

 Color Photography and Color Printing, N. H, Darton. 



The addresses of April i8, 1900, were followed by a conversazione 

 in honor of the National Academy of Sciences; those of May i, 1900, 

 were complimentary to the Congress of American Physicians and 

 Surgeons. 



For the winter of 1900-1901 a series of addresses has been arranged 

 on The Progress and Tendency of Science during the Nineteenth Cen- 

 tury. The first of this series was given on December 11, 1900, by 

 Professor F. W. Clarke, on ' The Progress and Tendency of Chem- 

 istry.' 



