The Period from 1901 to 1910 41 



The Philadelphia Meeting, December, 1904. ( Vol. 54) 



Mathematics and Astronomy. Otto H. Tittmann: "The Present State 

 of Geodosy." 



Physics. Edwin H. Hall : "A Tentative Theory of Thermo-Electric Ac- 

 tion." 



Chemistry. Wilder D. Bancroft : "Future Development in Physical 

 Chemistry." 



Mechanical Science and Engineering. Calvin Milton Woodward : "Lines 

 of Progress in Engineering." 



Geology and Geography. Israel C. Russell : "Cooperation among Amer- 

 ican Geographical Societies." 



Zoology. E. L. Mark: "The Bermuda Islands and the Bermuda Bio- 

 logical Station for Research." 



Botany. Thomas H. Macbride : "The Alamogordo Desert." 



Social and Economic Science. Simeon E. Baldwin : "The Modern 'Droit 

 D'Aubaine'." 



The New Orleans Meeting, Dec., 1905 - Jan., 1906. ( Vol. 55) 



Mathematics and Astronomy. Alexander Ziwet: "The Relation of Me- 

 chanics to Physics." 



Physics. William F. Magie : "The Partition of Energy." 



Chemistry. Leonard P. Kinnicutt : "The Sanitary Value of Water 

 x\nalysis." 



Mechanical Science and Engineering. D. S. Jacobus: "Investigations 

 and Commercial Tests in Connection with the Work of an Engineering 

 College." 



Geology and Geography. Eugene A. Smith : "On Some Post-Eocene and 

 Other Formations of the Gulf Region of the United States." 



Zoology. C. Hart Merriam : "Is Mutation a Factor in the Evolution of 

 the Higher Vertebrates?" 



Botany. B. L. Robinson : "The Generic Concept in the Classification of 

 the Flowering Plants." 



Anthropology. Walter Hough : "Pueblo Environment." 



Social and Economic Science. Martin A. Knapp : "Transportation and 

 Combination." 



Physiology and Experimental Medicine. William T. Sedgwick : "The 

 Experimental Method in Sanitary Science and Sanitary Administration." 



The New York City Meeting, Dec, 1906 - Jan., 1907. (Vol. 57) 



Mathematics and Astronomy. W. S. Eichelberger : "Clocks — Ancient 

 and Modern." 



Physics. Henry Crew : "Fact and Theory in Spectroscopy." 



