20 



NF.W YORK ST.\TI-: MUSEUM 



Production of common building brick (concluded ) 



a Included under "Other counties." 



6 Includes in 1907 Genesee, Herkimer, Livingston, Montgomery, New York, Queens, 

 St Lawrence and Wayne. In 1908 the following counties are included: Allegany, 

 Broome, Fulton, Herkimer, Montgomery, St Lawrence, Schenectady, Tioga, Tompkins, 

 Warren and Washington. 



Hudson river region. The greater part of the brick production 

 of the State is made in the Hudson river valley, in the stretch from 

 Rensselaer and Albany counties southward to Westchester county. 

 There is probably no other region in the whole country that com- 

 pares with it in the number of brick plants and annual output. 

 Practically the entire product belongs to the common grade of 

 building brick and is marketed in New York city and vicinity. With 

 its facilities for cheap water transportation the industry of this 

 section has little competition from other centers of brick manu- 

 facture that ship by railroad. 



The brick clays are found in terraced deposits on either side of 

 the river, reaching from water level to a hight of 300 feet or more 

 in places. They are interbedded with, and sometimes covered by, 

 layers of sand and gravel. Their thickness may exceed 100 feet, 

 though usually it is much less. Some clay is obtained by dredging 

 from the bed of the river, such operations being conducted in the 

 vicinit}^ of Haverstraw. The Hudson river clays are generally of 

 marly character, due to the presence of from 3 to 6 per cent of lime 

 carbonate. 



In the nine counties included in the region, there are more than 

 125 brickyards with a combined capacity of about one and a half 



