Lesley.] 1 40 [June 16, 
have for us, comes from the analyses given below. But the relations which 
these ores bear to other ores of similar composition, cannot be under- 
stood without a general description of the district. 
Fig. 1, will inform those who are not acquainted with American geo- 
graphy, of the geographical relationship of the Greensboro district to the 
Atlantic sea-board ‘and to the Blue Ridge Range of Primary mountains. 
The two Triassic belts containing coal appear on this map ; the eastern 
including the Richmond Coal Basin and that of Deep River ; the western 
that of Dan River, prolonged northward across the James River below 
Lynchburg, and originally connected with the continuous out-spread of 
the Trias in Maryland, Pennsylvania, New Jersey, and the Connecticut 
Valley. 
Fig. 2 gives, on a larger scale, the position of the ore-belt in Guilford 
and Rockingham Counties, N. C., and the radiation of railways, already 
running, or under survey, from Greensboro. 
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