T7 



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■rr 



FROM THE LETTER-FILES 

 OF S. W. JOHNSON 



Professor of Agricultural Chemistry 

 IN Yale University, 1856-1896 



Director of the Connecticut Agricultural Experiment 

 Station, 1877-1900 ' 



Edited by His Daughter 

 ELIZABETH A. OSBORNE 



NEW HAVEN: YALE UNIVERSITY PRESS 



LONDON: HUMPHREY MILFORD 



OXFORD UNIVERSITY PRESS 



MCMXIII 



