1846.] Agricultural Geology of Onondaga County. Ill 



be reached with the plow, and in fact a large part of the soil 

 is only partly comminuted in this field. Plowing and exposing 

 it to air, is necessary to complete the physical and chemical 

 changes which are necessary to bring the lands to their best state. 

 The following analyses show the composition of the cultivated 

 and uncultivated fields alluded to, as above: 



Cultivated. Uncultivated. 



97.80 98.16 



The soil along this range, embracing a belt upon an average 

 of two miles, extending we believe through the county from east 

 to west, is remarkably uniform in composition, and though the 

 analyses may vary in some particulars, yet they indicate but one 

 variety of soil. These analyses, however, are not given as com- 

 plete and perfect, we are still engaged with them, and hope to 

 add something in illustration of their composition. 



The green shales, from which the soils just described owe their 

 origin, is composed as follows: 



99.66 



The inorganic salts, the sulphates of lime, magnesia and soda, 

 Vol. III., No. II. 14 



