THE 



H \l IN'I'IC.Y ()I 



13 



jrrDV A1? AGMCULTtn 



FOR 



STUDENTS AND FARMERS 



BY 



CHARLES W. STODDART, Ph.D. 



PROFESSOR OF AGRICULTURAL CHEMISTRY IN THE PENNSYLVANIA 



STATE COLLEGE 



ILLUSTRATED WITH 83 ENGRAVINGS AND 1 PLATE 





LEA & FEBIGER 



PHILADELPHIA AND NEW YORK 



