Sci.D 



v/ 3 2^1 4 



ORGANIZ x E 

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TRADE MAfMV REGISTERED 



AND PICTURE 



EDITOR-IN-CHIEF 



M. V. O'SHEA 



DEPARTMENT OF EDUCATION, UNIVERSITY OF WISCONSIN 

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ELLSWORTH D. FOSTER 



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ASSISTED BY ONE HUNDRED FIFTY DISTINGUISHED SCIENTISTS, EDUCATORS, 

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