558 



PHYSICAL GEOGRAPHY. 



194.00 pounds of nitrogen (235.60 ammonia), 

 40.40 pounds of potassa, .... 



$8.20 

 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. 



