VEGETABLE 
FORCING 
BY 
RALPH L. WATTS 
DEAN AND DIRECTOR OF THE SCHOOL OF AGRICULTURE AND 
EXPERIMENT STATION OF THE PENNSYLVANIA STATE COLLEGE 
AND 
AUTHOR OF “VEGETABLE GARDENING,” A COMPANION 
VOLUME TO THIS TREATISE 
ILLUSTRATED 
NEW YORK 
ORANGE JUDD COMPANY 
1917 
wh. 
