C—3

1889. NEW ZEALAND.

MINING MACHINERY AND TREATMENT OF ORES IN AUSTRALIAN COLONIES.

REPOBTS ON MINING MACHINEEY EXHIBITED AT THE MELBOUENE EXHIBITION. ON MINING, AND PLANTS FOE THE EEDUCTION AND TEEATMENT OP OEES, IN THE AUSTEALASIAN COLONIES. ON PEOCESSES ADOPTED IN AMEEICA FOE TEEATMENT OF AUEIFEEOUS AND AEGENTIFEEOUS ORES.

Presented to both Houses of the General Assembly by Command of His Excellency.

CONTENTS.

PAGE Crushing and Pulverising Machinery .. .. 1-10 Stamps .. .. . ■ ■ ■ ■ • 1 Position of the Cam-shaft Curve of the Cams .. .. .. ■. 3 Order in which Stamps should fall .. .. 3 Stamps in the Mortar .. .. .. 3 Grating or Screens .. .. . ■ .. 3-6 Huntingdon Centrifugal-roller Quartz-mill .. 3 Cyclone or Wall Rolls .. .. .. 5 Bryan Roller Quartz-mill .. .. .. 5 Globe Crushing-mill .. .. .. 6 Rock-breakers required .. .. .. 7 Marsden's Fine Crusher or Pulveriser .. 7 Blake-Marsden Stone-breaker or Ore-crusher .. 7 Dodge Rock-breaker .. .. .. 8 Giant Rock-breaker.. .. .. .. 8 Dodge Pulveriser and Granulator .. .. 9 Ore-concentrators .. .. • • .. 10 Description of Improved Form of Frue Concentrator .. .. .. .. 10 Method of Working .. .. .. 11 Rules for Proper Consistency of Pulp .. 12 Price, Weight, Water, and Capacity .. 12 Additional Remarks and Explanations .. 13-16 Triumph Ore-concentrator .. .. .. 16-24 Directions for setting up and operating .. 17 Timber and Bolts for Foundation-frame .. 17 Directions for operating .. .. .. 18 McNeil's Gold-amalgamator and Ore-concen-trator .. .. .. ■• -• 18 Watson and Denny's Grincling-and-amalgamat-ing Pans .. .. -. .. 20 Fixing the Classifier .. .. .. 21 General Description .. .. .. 22 Molloy's Hydrogen-amalgam Pan .. .. 22 Watson and Denny Concentrator .. .. 24 General Description .. .. .. 24 Newbery and Vautin Chlorination Process .. 24-26 Hedley's Patent Electric Ore and Metal Converter .. .. .. .. .. 26-30 Rock-drills .. .. .. .. .. 30-35 Eclipse .. .. .- .. .- 30 Tripod .. .. .. .. .. 30 Shaft-columns .. .. " .. .. 30 I

PAGE Rook-drills— continued. Rand Drill Company's Rock-drills .. .. 31 The Little Giant.. .. .. .. 31 The Slugger .. .. .. .. 31 The Economizer.. .. .. .. 32 Sharpening and Tempering Drill-steels .. 32 Instructions for running the Rand Rookdrills .. .. .. .. .. 32 Naylor and Thornton Drill .. .. .. 33 Electric Drill .. .. .. .. 33 Water-auger .. .. .. .. .. 33-36 To fix Machine .. .. .. .. 34 To commence boring .. .. .. 34 To extract Gores .. .. .. .. 35 When Water is struck .. .. .. 35 To draw the Tubes .. .. .. .. 35 Fixing and working Jumping-motion.. 35 Gutters .. .. .. .-. .. 85 Price-list .. .. .. .. .. 35 Steam-boilers .. .. .. .. .. 30-43 Babcock and Wilcox Boiler .. .. .. 36 Description .. .. .. .. 36 Erection .. .. .. .. 37 Advantages claimed by the Makers .. 37 1. Thin Heating-surface in Boiler .. 37 2. Joints removed from the Eire .. 37 3. Largo Draught-area .. .. 37 4. Complete Combustion .. .. 37 5. Thorough Absorption of Heat .. 37 C. Efficient Circulation of Water .. 38 7. Quick Steaming .. .. .. 38 8. Dryness of Steam .. .. .. 38 9. Steadiness of Water-level .. 38 10. Freedom for Expansion .. .. 38 11. Safety from Explosions .. .. 38 12. Durability .. .. .. 38 13. Accessibility for Cleaning .. .. 38 14. Least Loss of Effect from Dust .. 38 15. Eo'ie of Transportation .. .. 38 16. Re jairs .. .. .. .. 38 17. Capacity .. .. .. .. 38 Walther and Co.'s Water-tube Boilers .. 39 Description of Boilers .. .. .. 39 Prices .. .. .. .. .. 39