THE MINING AND QUARRY INDUSTRY 919 



Along the Mohawk valley the clay deposits are exploited for 

 building brick, while at Troy considerable quantities of fire brick 

 and stove lining are also made. 



Throughout the central and southern counties of the State, 

 the Devonian strata covering this section include frequent beds 

 of shale, much of which is quite argillaceous and can be used for 

 the same purposes as clay. Up to the present time they have been 

 little developed, though their value has been satisfactorily de- 

 monstrated by the results obtained in their practical application. 

 Among the products that have been made from this material 

 are building and paving brick, terra cotta, roofing tile, flreproof- 

 ing and "sewer pipe. 



Production of clay materials 



The statistics set forth in the following pages have been com- 

 piled from returns made by the various producers of clay materials 

 for the year 1904. It is believed that they are complete and accu- 

 rate, as reports have been received from nearly every manufacturer 

 in the State. 



The total value of the various clay materials manufactured in 

 New York last year amounted to $11,504,704. This total is 

 undoubtedly a record one, largely exceeding that of any previous 

 year. It represents the combined output of 245 plants scattered 

 over 43 counties of the State. More than one half of the product 

 in value consisted of common building brick, which aggregated 

 $7,234,876. Front brick and fancy building brick accounted 

 for only $238,246 of the total, and vitrified paving brick for $210,707 ; 

 both being exceeded by the output of fire brick and stovelining, 

 which was valued at $506,800. The manufacture of draintile 

 reached a total of $149,864, and sewer pipe a total of $460,000. 

 The product of terra cotta was valued at $798,028; fireproofing 

 at $157,119, and building tile at $206,503. In addition there were 

 produced miscellaneous products, including flue lining, fire tile 

 and shapes, conduit pipes, sidewalk brick and acid-proof brick, 

 the collected value of which was $103,927. The potteries of the 

 State reported an output valued at $1,438,634. 



