152 



THE PIEDMONT REGION. 



Tlie following table will show the relations of these counties in these 

 four respects to the percentage of farm production on farm values in each. 



TABLE. 



Considered wholly within the limits of the above data, and bearing in 

 mind that they can give only an approximation to the truth, Prof. B. 

 Sloan, of the University of South Carolina, states the arithmetical con- 

 clusions to be obtained from this table as follows : 



An increase of ten per cent, of the proportion of tilled land in cotton 

 increases the values produced by seven and a half per cent. 



