COST OF A CROP OF CORN. 89 



lisliing of well-known truths. It takes precision of record 

 and statement to found a science, and when we examine the 

 science of agriculture, we see how deficient it is. Every 

 agricultural society should be an experimental station — no 

 matter how few or how many facts or discoveries it makes, 

 each one should have the precision and form which would 

 enable it to be used in connection with other facts derived 

 from other sources. The common facts of the farm are com- 

 paratively unknown. What is a day's labor at any kind of 

 work ? What is the effect of various kinds of food ? What 

 is the comparative value of various feeds used on our farms ? 

 What is the usual yield of a good milch cow ? These and 

 other simple questions, which should have been determined 

 long ago, still remain practically unanswered. The constants 

 of agriculture are yet to be given. 



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