HOW CROPS GROW. 



A TREATISE ON THE 



CHEMICAL COMPOSITION, STRUCTURE 

 AND LIFE OF THE PLANT. 



FOE STUDENTS OF AGEICULTURE. 



WITH 

 NUMEKOUS ILLUSTRATIONS XSTD TABLES OF ANALYSES. 



SAMUEL W^^HNSON, M. A., 



PROFEBSOK OP THEOKETIOAL AITD AGBIOUITUKAI, CHEMISTRT ITS THE SHEF- 

 FIELD SCIEWTIFIC 6CH00I. OF YALE tTNIVERSITY ; DIRECTOR OF 

 THE OOSNECTICnT AGRICCLTnRAL EXPEKIMENT STATION; 

 UEMBER OF THE NATIONAL AOADEMT OF BCIEHOBS. 



-:o: 



NEW YORK: 



ORANGE JUDD COMPAlSrY, 



751 BROADWAY. 



A(n^ 



