PRINCIPLES OF PLANT CULTURE 
AN ELEMENTARY TREATISE DESIGNED AS A 
TEXT-BOOK FOR BEGINNERS IN AGRI- 
CULTURE AND HORTICULTURE 
BY 
E. 8S. GOFF 
Proressor oF HorrTicul.TuRE IN THE UNIVERSITY OF WISCONSIN 
Madison, Wis. 
PUBLISHED BY THE AUTHOR 
1897 
