CLAYS OF NEW YORK V33 



Magnesia 2.6 



Potasli 4.1 



Water 9.7 



100.9 



The clay is said to exist in large quantity, forming a thick layer 

 at this point in the alluvial district of the Drowned lands, and un- 

 derlying much of the black muck surface of this district. The 

 specimen sent was thoroughly air-dried, was slate gray in color, 

 and showed a little fine gfitty sand. It contains too much oxid of 

 iron and potash for a refractory or fine material. Washing out 

 the fine sand might enable it to be used in some styles of paper 

 facing. It is most interesting as the basis of a valuable, enduring 

 and fertile soil, and if properly drained it would be unsurpassed for 

 tillage or pasturage; as such, it furnishes another argument for the 

 drainage of this tract of Drowned lands. 



't5^ 



Long Island and Staten Island yards 

 East Williston, Queens co. W. & J. Post have two yards at 

 this locality. Their clay pit is in a field some 500 feet west of the 

 yard on the land of H. M. Willis. The clay has been excavated to 

 a depth of about 15 feet; It is chiefly a bluish clay and can be 

 easily dug. The clay is extremely silicious, as the following analysis 

 shows, but the percentage of lime, magnesia and iron is low. 



Silica 69 . Y3 



Alumina 16 . 42 



Peroxid of iron 2.58 



Lime 1.66 



Magnesia .69 



Alkalis 6 . 27 



97.35 



