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NEW YORK STATE MUSEUM 



1 Includes china tableware an i cream-colored ware. 



CRUDE CLAY 



The clay obtained in a few localities is not utilized by the origi- 

 nal producer but is shipped to others for manufacture, some of it 

 going to points outside the State. This production, therefore, 

 is listed separately from that of clay materials. The clay most 

 extensively exploited for shipment is the Albany slip clay which is 

 found in layers within the ordinary brick clay of the Hudson 

 valley. It resembles the latter in appearance but has a finer grain 

 and a larger percentage of the alkaline constituents than the usual 

 run of the deposits. It has consequently a low fusibility and when 

 applied to clay wares as a " slip" gives a rich brown glaze. 



The light-colored refractory clays of Long Island and Staten 

 Island and various pottery clays are also shipped to some extent. 

 Returns were received from 6 producers in 191 1 and their total 

 shipments of crude clay amounted to 14.193 short tons valued at 

 $11,982. In the preceding year the reported shipments amounted 

 to 6005 short tons valued at $9667. The relatively higher value 

 assigned to the product in 19 10 is explained by the large proportion 

 of slip clay included in the total. 



EMERY 



The mining of emery has been carried on for a number of years 

 near Peekskill. Westchester county, one of the few places in this 

 country where the material is known to occur in quantity. The 

 industry is small, as the native emery does not find so wide a 

 market as the Grecian and Turkish product which can be imported 

 at low cost. 



The Peekskill emery is a mixture of corundum, spinel and mag- 

 netite chiefly, though the mineral composition is rather variable. 



