ILLUSTRATIONS. 



TEXT FIGURES. 



Pago. 



Fig. 1. Scheme showiuf^ hydraulic miiiiug 11 



2. Scheme showing Ziervogel process 34 



:5. Scheaie showing the operations of the Colorado Smelter 44 



4. Scheme showing the operations of the St. Joe Mill 63 



5. Scheme showing tbo operations of ihe Deslogo Mill 66 



6. One division of the Osceola Stamp Mill 88 



7. Scheme showing treatment of No. 4 in Osceola Stamp ilill 90 



8. Scheme showing treatment of slimes in Osceola Stamp Mill 91 



9. Scheme showing tail house treatment in Osceola Stamp Mill 92 



10. Scheme showing operations of the Galena Mill 178 



PLATE I (Page 2). 



Plan of Installation of Collections. 



Contents of cases: — Case 1, gold, minerals and ores. Case 2, gold, extraction and 

 application; iridosmine. Case 3, silver, minerals and ores. Case 4, silver, ores and 

 extraction. Case 5, silver, extraction; lead minerals; silver-lead, ores. Case 6, 

 silver-lead, ores and smelting. Case 7, refining base bullion ; lead, ores. Case 8, 

 lead, ores. Case 9, pig and white lead, Lone Elm; white lead, Dutch. Case 10, 

 copper, minerals and ores, Lake Superior region. Case 11, copper, ores, Lake Su- 

 pirior region. Case 12, copper, ores, Lake Superior region. Case 13, copper, smelt- 

 ing. Case 14, copper, smelting. Case 15, copper, smelting. Case 16, copper, smelt- 

 ing and application. Case 17, iron, minerals and ores, Tenth Census. Case 18, iron, 

 ores, Tenth Census. Case 19, iron, ores, Tenth Census. Case 20, iron, ores, Tenth 

 Census. Case 21, iron, ores, Tenth Census. Case 22, iron, ores. Tenth Census. Case 

 23, iron, ores, Tenth Census. Case 24, iron, ores. Tenth Census. Case 25, iron, 

 ores. Tenth Census. Case 26, iron, ores, Tenth Census; manganese, ores. Case 

 27, iron, extraction, wrought iron, aud cementation steel. Case 28, iron, extrac- 

 tion, Bessemer steel. Case 29, iron, extraction, pig iron. Case 30, iron, extraction, 

 pig iron. Case 31, iron, application, Fagersta steel tests. Case 32, iron, application, 

 Fagersta steel tests. Case 33, nickel and cobalt, minerals, ores, and application. 

 Case 34, zinc, minerals and ores. Case 35, zinc, preparation of blende and extrac- 

 tion. Case 36, zinc, extraction. Case 37, tin, antimony, chromium, and bismuth, 

 minerals and ores. Case 38, mercury, minerals and ores; aluminium, minerals and 

 extraction. Case 39, alloys. Case 40, alloys and tin plate. Case 41, sulphur, min- 

 erals, ores and application ; grinding and polishing materials. Case 42, grindiugand 

 polishing materials. Case 43, asbestos. Case 44, phosphates. Case 45, clays. Case 

 46, graphite. Case 47, anthracite coal. Case 48, anthracite coal. Case 49, s<'ini- 

 authracito coal. Case 50, semi-bituminous coal. Ca.se 51, bituminous coal. Case 

 52, bituminous coal, peat. Case 53, petroleum. Case 54, petroleum. Case 5.5, petro- 

 leum. Case 56, petroleum. Case 57, coal-mining tools. Case 58, coal-mining tools. 



XI 



