BKIOK TAKD8 



231 



JSforihjport. The ITorthport Clay and Fire-sand Co. has an 

 extensive series of pits on Little Neck near JSTorthport. 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 

 being 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 : 





Elm 

 Point. 



Glen 



Cove. 



Little 



Neck. 



Kreischer- 



ville. 



Kaolin 



Kreischer- 



viUe. 



Silica 



Alumina 



62.06 



18.09 



5.40 



1.05 



Trace. 



6.11 



70.45 

 21.74 

 1.72 

 0.24 

 0.30 

 5.00 



62.66 



18.09 



0.97 



0.79 



2.23 



64.26 



24.76 



0.83 



0.73 



Trace. 



2.35 



82.51 



11.57 



Oxide of iron 



Lime 



Magnesia 



Alkalies 



0.63 

 0.29 

 0.78 

 2.66 









92.71 



99.45 



84.74 



92.93 



98.44 



The following are analyses of Long Island stoneware clays 

 made by C. H. Joiiet (School of Mines Quart. Jan. 1895). 





White clay 



frona 

 Northport 



Black clay 



from 

 Northport. 



White clay 



from 

 Sea Cliff. 



Silica 



Alumina 



Ferrous oxide < 



68.34 



19.89 



.90 



.35 



tr. 



58.84 



23.40 



1.18 



1.03 



5.04 



.34 



9.20 



62.35 



23.14 



1.12 



Lime 





Magnesia 





Carbonic acid 





Sulphuric acid 





1.09 



Potash 



3.65 



.84 

 6.03 



3.17 



Soda 



1.76 



Combined water 



6.77 









99.90 



99.03 



99.40 



