A Strati graphical Study 151 
in connection with logging and milling may become permanent. 
For example: North of Wilkins’ Corners (fig. i) the second high- 
way leading west ascends about 160 feet in one-half mile; this 
road parallels a valley a few rods to the left, where the same 
horizontal distance involves only half the grade; the original high- 
way did follow the valley, connecting the two houses. But log- 
haulers from the wooded upland located their main road where it 
would command as much of the area as possible, approaching it 
Fig. 13. The Black Hand formation is generally a coarse, irregularly bedded 
sandstone, yielding a copious supply of spring water. 
by spurs along contours. This traffic fixed the road where it is, 
though it has never led directly to a dwelling; property complica- 
tions diverted the second house up the valley to it, the original 
roadway being abandoned. A similar influence in highway loca- 
tion due to mining operations is seen one and one-half miles west 
of Mary Ann Furnace in the road trending southwest from the 
one leading to Wilkins’ Corners. Some 50 years ago a vein of coal 
on this slope was worked for local use, and was approached from 
the west, thus opening a highway that has served little use since. 
It is evident also that so far as the intervalley roads are con- 
cerned, the topographic factor made slight appeal to the locating 
