CONTENTS OF VOL. 15. 
Page 
Samuel Pierpont Langley, Cyrus Adler 1 
The Progress of Science as illustrated by the Development of 
Meteorology, Annual Presidential Address, 1906, Cleveland 
Abbe 27 
The Earth a Failing Structure, Annual Presidential Address, 
1907, J. F. Hayford 57 
On the Temperature and Structure of the Sun, Address delivered 
by invitation, O. Lummer 75 
The Instruments and Methods of Research, Annual Presidential 
Address, 1908, L. A. Bauer 103 
William Eimback, Edwin Smith 127 
Simon Newcomb, Memorial Addresses by C. Iv. Wead, James 
Bryce, Milton Updegraff, It. S. Woodward, L. O. Howard, 
Herbert Putnam, E. M. Gallaudet. Resolutions read by O. H. 
Tittmann 133 
Music and Science, Annual Presidential Address, 1910, C. Iv. 
Wead 169 
Index 189 
