822 NEW YOKK STATE MUSEUM 



It is probable that tbe washing of this clay and the consequent 

 elimination of the grit would greatly increase its refractory power. 



The black clay which underlies the lower is somewhat less sandy, 

 running thus : 



Clay substance and silt 81 . 00 



Finest sand 3 . 30 



Fine sand 16 . 20 



100.50 



Like the preceding, it is not a highly refractory clay, fusing com- 

 pletely at cone 27 in the Deville furnace. It does, however, bum 

 to a dense body of cream white color and its chief use is for stone- 

 ware. There is apparently no reason why it should not work for 

 the manufacture of white or yery light buff brick. The shrinkage 

 at cone 3 is 8^, and at cone 6, 12^, at which temperature it is nearly 

 non-absorbent, and begins to deepen in color. 



The following is an analysis of the Eaton's neck clay, made by 

 Dr H. 0. Bowen. 



Silica . ; -. . . 66 .46 



Alumina 22 . 33 



Ferrous oxid 1.38 



Lime .67 



Magnesia .07 



Potash 1.52 



Soda .58 



Phosphoric acid .10 



Moisture .31 



"Water 6.21 



99.63 



