MECHANICAL FEEDING OF SILVER-LEAD BLAST FURNACES (ARTHUR S. DWIGHT) 81 COST OF SMELTING AND REFINING (MALVERN W. ILES) 96 SMELTING ZINC RETORT RESIDUES (E. M. JOHNSON) 104 ZINC OXIDE IN SLAGS (W. MAYNARD HUTCHINGS) 108 PART V LIME-ROASTING OF GALENA THE HUNTINGTON-HEBERLEIN PROCESS 113 LIME-ROASTING OF GALENA (EDITORIAL) 114 THE NEW METHODS OF DESULPHURIZING GALENA (W. BORCHERS) 116 LIME-ROASTING OF GALENA (W. MAYNARD HUTCHINGS) 126 THEORETICAL ASPECTS OF LEAD-ORE ROASTING (C. GUILLEMAIN) 133 METALLURGICAL BEHAVIOR OF LEAD SULPHIDE AND CALCIUM SULPHATE (F. O. DOELTZ) 139 THE HUNTINGTON-HEBERLEIN PROCESS (DONALD CLARK) 144 THE HUNTINGTON-HEBERLEIN PROCESS AT FRIEDRICHSHÜTTE (A. BIERNBAUM) 148 THE HUNTINGTON-HEBERLEIN PROCESS FROM THE HYGIENIC STANDPOINT (A. BIERNBAUM) 160 THE HUNTINGTON-HEBERLEIN PROCESS (THOMAS HUNTINGTON AND FERDINAND HEBERLEIN) 167 MAKING SULPHURIC ACID AT BROKEN HILL (EDITORIAL) 174 THE CARMICHAEL-BRADFORD PROCESS (DONALD CLARK) 175 THE CARMICHAEL-BRADFORD PROCESS (WALTER RENTON INGALLS) 177 THE SAVELSBERG PROCESS (WALTER RENTON INGALLS) 186 LIME-ROASTING OF GALENA (WALTER RENTON INGALLS) 193 PART VI OTHER METHODS OF SMELTING THE BORMETTES METHOD OF LEAD AND COPPER SMELTING (ALFREDO LOTTI) 215 THE GERMOT PROCESS (WALTER RENTON INGALLS) 224 PART VII DUST AND FUME RECOVERY FLUES, CHAMBERS AND BAG-HOUSES DUST CHAMBER DESIGN (MAX J. WELCH) 229 CONCRETE IN METALLURGICAL CONSTRUCTION (HENRY W. EDWARDS) 234 CONCRETE FLUES (EDWIN H. MESSITER) 240 CONCRETE FLUES (FRANCIS T. HAVARD) 242 BAG-HOUSES FOR SAVING FUME (WALTER RENTON INGALLS) 244 PART VIII BLOWERS AND BLOWING ENGINES ROTARY BLOWERS VS. BLOWING ENGINES FOR LEAD SMELTING (EDITORIAL) 251 ROTARY BLOWERS VS. BLOWING ENGINES (J. PARKE CHANNING) 254 BLOWERS AND BLOWING ENGINES FOR LEAD AND COPPER SMELTING (HIRAM W. HIXON) 256 BLOWING ENGINES AND ROTARY BLOWERS (S. E. BRETHERTON) 258 PART IX LEAD REFINING THE REFINING OF LEAD BULLION (F. L. PIDDINGTON) 263