558 



PHYSICAL GEOGRAPHY. 



194.00 pounds of nitrogen (235.60 ammonia), 

 40.40 pounds of potassa, .... 



$58.20 

 3-23 



$91.61 



By studying these tables the farmer can know what fertilizers are most 

 important for producing required products, and also whether the price 

 required for these fertilizers is reasonable. 



The great amount of matter pressing upon us for presentation makes 

 it necessary to defer any further notice of the relations of geology to 

 agriculture. 



Fig. 67. — MADISON AND WASHINGTON, FROM SHELBURNE. 



