OTHER RESOURCES 135 



rx^ 



Table III. Value of Mining Products in 

 New York 



Clay products .$11,871,949 



Iron 3,095,023 



Salt 2,897,000 



Petroleum and natural gas 2,688,996 



Cement 2,409,000 



Limestone 2,656,142 



Bluestone 910,054 



Slate 99,827 



Traprock 755,128 



Granite 444,435 



Marble 344,981 



Feldspar 47,166 



Gypsum 1,048,403 



Talc and soapstone 314,724 



Garnet 101,920 



Emerv lfi,389 



Graphite 138,905 



Other products 184,294 



WATER SUPPLY 



The numerous streams, springs and lakes in the 

 State, coupled with the fairly generous rainfall, af- 

 ford a good general supply of potable water. The 

 runoff of about 50 per cent of the rainfall ranges from 

 less than twenty inches in the Great Lakes region to 

 a little more than twenty over the plateau and the 

 Hudson Valley sections, and thirty inches or more 

 in the Adirondacks. Limited investigation indi- 

 cates that with the extension of the tilled area 

 and the reduction in the area of forest land and 

 forest covering, there has been an appreciable drop 

 ill the general level of the ground water-table. As 

 fi^presented by the level of water in wells at different 



