ELEMENTS 
OF 
AGRICULTURAL CHEMISTRY, 
IN 
A COURSE OF LECTURES 
FOR 
THE HOARD OF AGRICULTURE ; 
DELIVERED 
BETWEEN 1802 AND 1812 . 
BY 
Sm HUMPHRY DAVY, Bart. Pres. R. S. &c. 
THE FOURTH EDITION, 
LONDON: 
PRINTED FOR 
LONGMAN, REES, ORME, BROWN, AND GREEN# 
PATE RNO STE R- RO W , 
1827 . 
