506 CLAYS AND CLAY INDUSTRY. 



UNION COUNTY. 



Murray Hill. — A red-burning clay occurs at Murray Hill, on 

 the property of H. Wilcox (Loc. 290). It is fairly plastic, work- 

 ing up with 30.8 per cent, water to a mass whose air shrinkage is 

 8 per cent. The tensile strength was 134 pounds per square inch. 

 The clay had a high fire shrinkage at cone 05 of 1 1 per cent, and 

 an absorption of 3.12 per cent. It burned red and steel-hard at 

 this cone. At cone 1 it began to< fuse, so that it is a very easily 

 fusible material, but burns to a hard red brick at a rather low 

 temperature. 



EUzabethport. — Red clay for common brick, 1 6 to 10 feet deep, 

 has been worked at Elizabethport for a number of years, at Jacob 

 Hammer's plant, located on south Front street and Bay way. 



Berkeley Heights. — A bed of black clay, 30 feet deep and cov- 

 ered by 1 to 2 feet of soil, has been worked at Berkeley Heights, 

 under lease by Kresner & Holland, for common-brick manufac- 

 ture. 2 The clay is said to be free from grit and very plastic. 



Linden. — A very plastic surface clay near Linden is drawn on 

 for 'supplying several earthenware potters in neighboring towns. 

 It is red burning. 



Netherzvood. — A very tough, stiff-working clay, requiring the 

 admixture of large quantities of loam, has been worked at Nether- 

 wood for brick, but none were being made when the canvass for 

 this report was undertaken. 



*N. J. Geol. Surv., 1898, p. 205. 

 2 Ibid. 



