BKICK YARDS 213 



It will be seen from the above that the clay runs high in iron, 

 which would apparently make it fusible ; however it is found to 

 stand a high heat, according to a report made on it by Dr. IST. L. 

 Britton, of Columbia college. About one eighth sand had to be 

 added to the clay for brick or tile ware. The sand, which is of a 

 bright yellow color, is in banks along the Navesink River near 

 the clay beds. This clay is also said to be available for paint. 

 Oakland Yalley is about 12 miles from Port Jervis. 



New Paltz, Ulster Co. ISTew Paltz Brick Co, Their brick yard 

 is located on the outskirts of the town and near the Wallkill 

 Yalley Railroad, with which it is connected by a switch. The 

 clay deposit is yellow, red and blue in color, and varies in depth 

 from 15 to 50 feet. It underlies a tract of six acres. The 

 separation of the clay in four to eight inch layers facilitates 

 the digging of it. There is a thin stratum of overlying sand 

 which has to be first stripped. Soft mud machines operated by 

 horse power are used for molding. 



Warwick, Orange Co. Although there are no brick yards in 

 this vicinity, still extensive deposits of clay are undoubtedly 

 present. A sample of clay from the Drowned Lands, lying along 

 the Wallkill River in Orange Co., was analyzed in the laboratory 

 of the IST. J. Geol. Surv. with the following results : 



Silicic acid in combination 28 . 9 



Quartz 22 . 9 



Silicic acid free 1.2 



Titanic acid 0.5 



Oxide of alumina '-^3 . 1 



Peroxide of iron 7.2 



Lime 0.7 



Magnesia 2.6 



Potash 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 underlying much of the black muck surface of this district. 



