AN 
ESSAY ON MANURES, 
SUBMITTED 
TO THE TRUSTEES 
OF THE 
MASSACHUSETTS SOCIETY 
PROMOTING AGRICULTURE, 
FOR THEIR PREMIUM. 
BY SAMUEL L. DANA 
Manures are the riches of the field.—C haptal. 
NEW YORK: 
A. 0 . MOORE, AGRICULTURAL BOOK PUBLISHES. 
(LATE 0. M. SAXTON & CO.,) 
NO. 140 FULTON STREET. 
1 8 6 9 . 
