20 



BULLETIN 102, U. S. DEPARTMENT OF AGRICULTURE. 



understood, however, in commercial grading that ''condition of 

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Fig. 17.— Graphic comparison of the average degree of acidity and the average percentage of germination 

 for each commercial grade of corn received at a terminal market (B), by months, from November, 1911, 

 to June, 1913, inclusive. 



ncls, other grains, unnatural odors, and excessive percentage of 

 moisture — as corn is spoken of as being clean or dirty; mixed with 



