40 The Period from 1901 to 19 10 



Physics. D. B. Brace: "The Group- Velocity and the Wave-Velocity of 

 Light." 



Mechanical Science and Engineering. Henry S. Jacoby: "Recent Prog- 

 ress in American Bridge Construction." 



Geology and Geography. Charles R. Van Hise : "The Training and 

 Work of a Geologist." 



Zoology. David Starr Jordan : "The History of Ichthyology." 



Botany. B. T. Galloway : "Applied Botany, Retrospective and Prospec- 

 tive." 



Anthropology. J. Walter Fewkes : "Prehistoric Porto Rico." 



Social and Economic Science. John Hyde: "Some Statistical and Eco- 

 nomic Aspects of Preventable Disease." 



The Washington Meeting, Dec, 1902- Jan., 1903. (Vol. 52) 



Mathematics and Astronomy. G. W. Hough: "On the Physical Con- 

 stitution of the Planet Jupiter." 



Physics. W. S. Franklin: "Popular Science." 

 Chemistry. H. A. Weber : "Incomplete Observations." 

 Mechanical Science and Engineering. J. J. Flather: "Modern Tend- 

 encies in the Utilization of Power." 



Zoology. C. C. Nutting : "The Perplexities of a Systematist." 

 Botany. D. H. Campbell : "The Origin of Terrestrial Plants." 

 Anthropology. Stewart Culin: "America the Cradle of Asia." 

 Social and Economic Science. Carroll D. Wright : "The Psychology of 

 the Labor Question." 



Physiology and Experimental Medicine. William H. Welch : "The Origin 

 and Aims of the New Section of Physiology and Experimental Medicine." 



The St. Louis Meeting, Dec., 1903- Jan., 1904. (Vol. 53) 



Mathematics and Astronomy. G. B. Halsted : "The Message of Non- 

 Euclidian Geometry." 



Chemistry. Charles Baskerville : "The Elements : Verified and Un- 

 verified." 



Mechanical Science and Engineering. C. A. Waldo: "Mathematics and 

 Engineering." 



Geology and Geography. W. M. Davis: "Geography in the United 

 States." 



Zoology. C. W. Hargitt : "Some Unsolved Problems of Organic Adapta- 

 tion." 



Social and Economic Science. H. T. Newcomb : "Some Recent Phases 

 of the Labor Problem." 



