CLAYS OF NEW YORK 



THEIR PROPERTIES AND USES 



PKEFAOE 



The following report is an enlargement of one prepared hj the 

 writer in 1895, which was published as Bulletin no. 12 of th© 'New 

 York state museum, and is made necessary by the increased de- 

 velopment of the New York clay-working industries, as Avell as by 

 an increased knowledge of the properties and technology of the 

 different varieties of clay. 



While portions of the original report have been allowed tO' stand 

 as first published, the gTeater part has been rewritten and many addi- 

 tional data have been incorporated. 



New York is not the leading state in manufacture of clay 

 products, but its output is by no means small, as can be seen from 

 the following figures issued by the U. S. geological survey for the 

 year 1898. 



Value of output 



Common brick . $4 381 257 



Pressed brick 260 135 



Paving brick 302 680 



Ornamental brick 8 665 



Fire brick 386 624 



Drain tile 74 072 



Sewer pipe 89 224 



Terra cotta 367 854 



Fireproofing .- 87 152 



Tile (not for drains) 83 910 



Potteiy 44 556 



Miscellaneous 262 860 



$6 448 989 



