1846.] Agriculhiral Geology of Onondaga County. 179 



Pentamrus limestone. 



98.78 99.98* 



In these analyses the composition of the soil may be considered 

 essentially the same, although more lime and magnesia seems to 

 exist in the surface soil. The analyses were made for the purpose 

 of determining the quantity of lime and magnesia, and also to de- 

 termine whether the limestone beneath could be depended upon for 

 furnishing a supply of these elements. The result in this in- 

 stance shows less than the circumstances would lead us to expect. 



The composition of the limestones w'hich furnish the soil in 

 part, is as follows: . 



49.39 55.24 



In the water lime there was too much loss, and hence there 

 was something defective in the process. The analyses, though 

 not correct, show a wide difference in the composition of the 

 rocks, particularly as to the quantity- of magnesia. This layer of 



* The analyses were made by Mr. Geo. H. Smith, a pupil in my labora- 

 tory; the want of time has prevented a reexamination of the water lime. 



