PART IV. 



METALLURGY. 



CONTENTS. 



Page 



1. ASSAYING PROCESSES; ANALYTICAL APPARATUS. - 5 



2. MODELS AND DRAWINGS SHOWING THE CONSTRUCTION 



OF FURNACES USED IN METALLURGICAL OPERATIONS - 11 



3. METALS AND METALLIC ORES - - 14 



4. MODELS, APPARATUS, AND SPECIMENS TO ILLUSTRATE 



THE PRODUCTION OF IRON, STEEL, AND OTHER METALS 23 



LIST OF CONTRIBUTORS - - - - -24 



Uu 71731. 1500 & 6. 11/92. Wt. 2072. A 2 



