AMERICAN 



QUAKTERLT JOURNAL 



or 



AGEICUITURE AND SCIENCE. 



'•^^- JULY, 1845. 



No. 1. 



AGRICULTURAL GEOLOGY. 



.eral obsorvations on the soils derived from the decomposition of different rocks 

 lass.ficafon o rocks. Analysis of simple minerals : felspar and aU^eXZdo 

 . ; hornblende; hypersthene; serpentine; basalt and greenstone Dx^ftedsot.' 



Soils derived from the decomposition of different rocks. 

 I h the pursuit of an important object, it is wise and proper to 

 ad ourselves of all the aids within our reach to secure its at- 

 itament ; and it is an imperious duty so to do, when the object 

 tcbe obtained is surrounded with difficulties, and where every 

 re of light IS wanted to illuminate dark and obscure points 

 Udh agriculture all the modern sciences send their licrhts some 

 m|-eand some less- all, however, impart something" and lend 

 t ,.r aid to its promotion. Ln this office geology is behind none 

 0^.1^ unkss It be chemistry, whose range is not only great, but 

 m;u e, affecting every and all departments. A great many facts, 

 stp^tly geological, have an important bearing upon the subject 

 be-re usj such as the nature of the rock, its structure and posi- 

 tK, Its composition, its relations to moisture, and liability to solu- 

 te Ihe position of the rocks of a district, as will be seen in 

 ti.sequel is always an important point, and in some cases all that 

 sentially requisite; for it often adds value to their possession 



■>L. II. — NO, I. A ' 



-KO. I. A 



