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NEW YORK STATE MUSEUM 



The Potsdain sandstone is quarried on a small scale at many 

 points for local building material. It is also an excellent ma- 

 terial for paving stones, and, as it forms a long scarp paralleling 

 the railroad in the town of Hammond, it is worked on a consider- 

 able scale for this purpose. 



A good deal of the rock is also used for road metal, but as it 

 contains no cementing material, it is not well suited to this use. 

 For ordinary road-building, the crystalline limestone is better, 

 and is used when readily accessible. The same rock is also quar- 

 ried and burned for lime. 



At present, there are no other active mineral industries in the 

 region; and, for the future, it is safe to say that only in the line 

 of building stones is there likely to be any great development. 



