BRICK YAED8 



231 



NorthporL The Xorthport Clay and Fire-sand Co. has an 

 extensive series of pits on Little Neck near Xorthport. Both fire 

 sand and clay are obtained. The clay bank has a height of about 

 40 feet and the clay is of a bluish black and yellowish white 

 color. The darker clay is the lower, and contains much 

 carbonaceous matter. The deposit is stratified, the layers of clay 

 beiDg separated by thin sheets of a rather coarse sand. It is 

 shipped chiefly to New England. 



The following are analyses of New York stoneware clays and 

 Kaolin : 



Silica 



Alumina .... 

 Oxide of iron 



Lime 



Magnesia . . . 

 Alkalies 



E'm 

 Poiut. 



Glen 

 Cove. 



Turtle 

 Neck. 



Kreiseher- 

 vil!e. 



Kaolin 

 Kreiscber- 

 vilie. 



62.06 



70.45 



62.66 



64.26 



82.51 



18.09 



21.74 



18.09 



24.76 



11.57 



5.40 



1.72 



0.97 



0.83 



0.63 



1 .05 



0.24 



0.79 



0.73 



0.29 



Trace. 



0.30 





Trace. 



0.78 



6.11 



5 . 00 



2.23 



2.35 



2.66 



92.71 



99.45 



84.74 



92.93 



98.44 



The following are analyses of Long Island stoneware clays 

 made by C. II. Joiiet (School of Mines Quart. Jan. 1S95). 





tf~hite clay 



from 



Northport 



Black clay 



from 

 Nonhport 



White clay 



fr in 

 Sea Cl.ff. 





68.34 

 19.89 

 .90 

 .35 

 tr. 



58.84 

 23.40 

 1.18 



62.35 

 23.14 

 1.12 







Lime 



Magnesia 







Carbonic acid 









Sulphuric acid 





1.03 

 5.04 

 .34 

 9.20 



1.09 

 3.17 

 1 .76 

 6.77 



Potash 



3.55 

 .84 

 6.03 





Combined water 





99.90 



99.03 



99.40 



