AGRICULTURE WITH CHEMISTRY. i^i 



a ■work, which has for its object the making ever)' far- 

 mer, t(^ a certain extent, a chemist, so that he may be 

 enabled to understand the nature and properties of the 

 several substances, in the management of which he is 

 daily engaged ; and that in all his future attempts to im- 

 prove the soil, the success of his operations may no 

 longer depend on guess-work, or on chance, but be 

 regulated by a proper knowledge of the materials he 

 may have to work with — how each may best be applied 

 or aclcd upon, and what efFeils will ensue from their 

 different combinations. 



Cultivators of the soil should be able to distinguish, 

 by chemical tests, the proportion of the following sub- 

 stances in different soils, viz. 



Clay, 



Chalk, 



Sand, 



Magnesia, 



Earth of iron, and y 



Vegetable matter. 



They 



