CONTENTS. vii 



PART III -THE MANUFACTURE OF CLAY PRODUCTS, WITH 

 ESPECIAL REFERENCE TO THE NEW JERSEY INDUSTRY. 



PAGE 



Introductory Statement, 213 



Chapter X. The Manufacture op Building Brick, 217-241 



Raw materials, 218 



Common brick, 218 



Pressed brick, 221 



Enameled brick, 222 



Glazed brick, • 223 



Methods of manufacture, 223 



Preparation, 223 



Dry crushing, 223 



Soak pits, 225 



Ring pits, 225 



Pug mills, 225 



Wet pans, 226 



Molding, 226 



Soft-mud process, 226 



Stiff-mud process, 228 



Dry-press and semidry-press processes, . . . 230 



Re-pressing, 232 



Drying, 233 



Burning, 234 



Flashing, 237 



Kilns, 239 



Updraft kilns, 240 



Continuous kilns, 241 



Chapter XL The New Jersey Brick- making Industry, 243-268 



History, 243 



Methods of manufacture, 245 



Preparation, 245 



Tempering, 246 



Molding, 246 



Drying, 246 



Burning, 247 



Shrinkage measurements, 248 



Tests of New Jersey bricks, 250 



Explanation of tests, 251 



Crushing test, , 251 



Transverse test, 252 



Absorption test, 253 



Explanation of table, 255 



Table of brick tests, 256 



Comments on brick tests, 257 



Value of New Jersey brick, 266 



Directory of brick manufacturers, 266 



