NINTH ANNUAL REPORT OF THE SECRETARY, 1906. 



To the Washington Academy of Sciences : 



Mr. President and Members of the Academy : During the period 

 from January iS, 1906, to January 17, 1907, the Academy has held 

 the following meetings : 



January iS, 1906 — Annual meeting for the election of officers, 

 etc. 



February 6, 1906 — Meeting to hear an address by Prof. Harry 

 Fielding Reid on " The Various Methods of Estimating the Age of the 

 Earth." This was discussed by Prof. Henry F. Osborn, Prof. Simon 

 Newcomb and Mr. Bailey Willis. 



February 23, 1906 — Meeting to hear a paper on u Old Age, Its 

 Nature and Cause," by Prof. Chas. Sedgwick Minot. Discussed by 

 Prof. A. F. A. King, Marshall A. Price and Dr. Harvey W. 

 Wiley. 



February 27, 1906 — Meeting to hear the annual address of the 

 President of the Anthropological Society, Dr. Geo. M. Kober, on 

 " The Health of the City of Washington." 



April 14, 1906 — Meeting to hear a paper by Mr. John F. Hay- 

 ford, on " The Recent Geodetic Evidence of Isostasy and its bearing 

 upon the greater Geologic Problems." Introduced by Mr. O. H. Titt- 

 mann and dircussed by Major C. E. Dutton, Dr. C. Willard Hayes 

 and others. 



May 17, 1906 — Meeting to hear an address by Prof. Francis Gano 

 Benedict on "The Respiration Calorimeter and the Factors of Human 

 Nutrition." Discussed by Dr. J. B. Nichols, Dr. E. B. Rosa, and 

 Dr. C. F. Langworthy. 



November 27, 1906 — Meeting to hear an address by Prof. Chas. 

 Hubbard Judd on " Visual Perception." Discussed by Prof. G. M. 

 Stratton. 



December 13, 1906 — Meeting to hear an address by Dr. Alexander 

 Graham Bell on " Aerial Locomotion." Discussed by Mr. C. F. 

 Manly and Prof. A. F. Zahm. 



At the meeting of November 27, amendments to the By-Laws were 

 adopted providing for a class of life members. 



The Board of Managers has held eight meetings for the transaction 

 of business. 



