32 Journal of the Mitchell Society [June 



products at the surface on the lower part of the slopes. These 

 produce sandy or gravelly soils that are, as a rule, inferior in 

 quality. They respond readily, however, to the influences of 

 modern methods in agriculture : crop rotations, diversified farm- 

 ing, the growing of fertilizing crops, etc. 



The rugged topography with its east-west valleys and divides 

 retards the development of railway transportation, thus depriv- 

 ing the area of ready access to market. This, with the above 

 mentioned factors, accounts for the low value of land in a tier 

 of counties^ along the eastern margin of the Piedmont Belt from 

 Granville and Person to Montgomery and Moore inclusive, 

 Orange being one of the number.^ 



Zone 4 of the generalized section provides a natural sand-clay 

 suitable for use in road building. ^^ The material used on Frank- 

 lin Street was taken from a pit opened in this zone, the upper 

 part of this zone should not be used without the addition of 

 stream sand. Numerous other places in this area would yield 

 material of the same quality. The stream sand is used also in 

 making mortar, etc. 

 Chapel Hill, N. C. 



* North Carolina Svipplement, Tirteenth Census Report. 



9 Holmes, J. S., Timber Resources of Orange County, N. C. Jour. E. Mit- 

 chell Sci. Soc. 39 :89, 1914. 



" Smith, John E., Natural Sand-Clay in the Piedmont, Southern Good Roads, 

 current number. 



