LESSONS ON CORN. 19 
corn States. Explain the cause of the difference in climate and 
agricultural products. What cities of the United States are the 
leading markets and distributing points of the corn crop? Compare 
‘corn with other grains, both as to total yields and as to amounts 
exported. 
Arithmetic—Have pupils report these facts from their homes: 
The number of acres planted to corn, the prevailing rent price per 
acre, the total yield, the amount of fertilizers used per acre, the labor 
required to prepare the seed bed, cultivate, and harvest the crop. 
‘From these facts develop problems to determine the average cost of 
growing an acre and of producing a bushel. Find the average yield 
per acre and its value based on local prices. Is the corn of the com- 
munity grown at a profit or loss? Find the per centum profit or loss. 
WASHINGTON 3? GOVERNMENT PRINTING OFFICE: (918 
