474 FINAL ACT OF SECOND PAN AMERICAN SCIENTIFIC CONGRESS. 



SPANHOOFD, ARNOLD WERNER, Department of Modern Languages, High 



Schools, Washington, D. C. 

 Alternate Modern Language Association of America. 



SPENCER, A. C., Geological Survey, Department of the Interior, Wash- 

 ington, D. C. 

 Alternate Geological Society of Washington. 



SPENDER, H. B., Vice President Southern Railway, Washington, D. C. 

 Delegate American Highway Association. 

 Alternate American Railway Engineering Association. 



SPERRY, ELMER A., Sperry Gyroscope Company, Manhattan Bridge Plaza, 



Brooklyn, N. Y. 



Paper presented: The Gyroscope Applied to Aerial and Water Navi- 

 gation. 



SPILLMAN, W. J., American Farm Management Association, Department 



of Agriculture, Washington, D. C. 

 Delegate American Farm Management Association. 



SPINDEN, HERBERT J., American Museum of Natural History, New York 



City, N. Y. 



Alternate American Museum of Natural History. 

 Papers presented: 



On the Origin and Distribution of Agriculture in America. 

 Recent Progress in the Study of Maya Art. 



SPRAGUE, NORMAN S., Superintendent of Bureau of Engineering, Pitts- 

 burgh, Pa. 

 Delegate American Society of Municipal Improvements. 



SPRINGER, FRANK, School of American Archaeology, Museum of New 



Mexico, Santa Fe, N. Mex. 

 Delegate School of American Archaeology. 



STAAL, GEORGE, President Engineers' Society of Milwaukee, Wells 



Building, Milwaukee, Wis. 

 Delegate Engineers' Society of Milwaukee. 



STABLER, HERMAN, United States Geological Survey, Washington, D. C. 

 Member of Committee, Subsection 3, Section III. 



STANDISH, JOHN VAN NESS, President Knox College, Galesburg, 111. 

 Delegate Knox College. 



STANFORD, HOMER R., Bureau Yards and Docks, Navy Department, 



Washington, D. C. 

 Delegate Bureau Yards and Docks, Navy Department. 



