390 CLAYS AND CLAY INDUSTRY. 



whose air shrinkage is 4.3 per cent., and fire shrinkage is 4.4 per 

 cent. The clays burn to a red brick with the exception of the 

 light sandy Raritan material, which burns whitish and shows as 

 spots in the brick. 



At W. Scattergood's brickyard, north of Rancocas (Loc. 126) , 

 a surface clay loam has been used for brick and draintile. The 

 deposit is dug only to a depth oi 3 or 4 feet, but is reported to 

 be much deeper. While its age and manner of origin are not 

 definitely known, yet it is probably of late Pleistocene age. 



Clay -work ing Industry. 



A large portion of the brick industry so extensively developed 

 along the Delaware river is included within the limits of Burling- 

 ton county. 



Common red brick of good quality are made in considerable 

 quantities at Bordentown, by the Bordentown Brick Company ; at 

 Kinkora, by J. Martin and M. Dobbins ; at Fieldsborough, by S. 

 Graham & Co. ; at Edgewater Park, by H. C. Adams, and at 

 Maple Shade, by A. Reeves and Theo. Saucelein. The product 

 is made by the stiff-mud process and burned in updraft kilns. 

 Brick and draintile are also made intermittently by W. Scatter- 

 good, at Rancocas. The raw materials are Clay Marls, Raritan, 

 or Pleistocene clays, to which there is added a certain proportion 

 of surface loam of Pleistocene age. 



Hollow brick are made from Clay Marl II, at Crosswicks, by J. 

 Braislin & Son, and by A. Reeves, at Maple Shade, who makes 

 some draintile also. Terra cotta is manufactured at Burlington 

 and Moorestown, by the Burlington Terra Cotta Co>., the clays for 

 this latter product being- dug partly in the county, and in part 

 brought from the Woodbridge district. Whiteware is made at 

 Bordentown, but no other potteries are in operation in the county. 

 Much of the Raritan clay dug along the Delaware river is sold 

 for foundry use, and to' a smaller extent for fire brick. It is not 

 highly refractory, but would be classed as a No. 2 fire clay. 



