Page Alluvial Mining— continued. Shotover — continued. R. Johnstone's Claim .. .. .. 125 Londonderry Terrace Sluicing Company .. 125 Aspinall's Claim .. .. .. 125 Southland District .. .. 125-128 Round Hill .. .. .. 125-127 Round Hill Syndicate Company .. .. 126 Wilson's River .. .. 127,128 Dredging .. .. .. 128-132 West Coast .. .. .. 128,129 Taylor's Dredging Company .. .. 12S Alexandra dredge .. .. .. 128 Matakitaki dredge .. .. .. 129 Otago District .. .. .. 129-132 Waipori .. .. .. 129,130 Jutland Flat Company .. .. 130 Clutha Valley .. .. 130,131 Shotover .. .. .. ..132 Sandhills Company .. .. .. 132 Artesian Well-boring, Maniototo Plains.. .. 132 Geological Explorations of the Northern Part of Westland, by Alexander McKay, F.G.S., Mining Geologist .. .. .. 132-186 Memorandum of Instructions for Mr. McKay 133,134 Physical Aspect and General Geological Structure of the District examined .. .. 134-145 District East of the Main Range .. 134,135 Northern Part of Westland .. .. 135,136 Physical Characteristics of the Northern Pare of Westland .. .. .. ..136 Grey River System, Valley of the Arnold River 136-137 Teremakau Valley .. .. 137-142 Kapitea Creek .. .. .. .. 142 Waimea Creek .. .. .. .. 142 Arahura Valley .. .. 142-144 Houhou Creek .. .. .. .. 144 Hokitika Valley .. .. 144-145 Mahinapua Lake and Creek .. .. 145 Totara Valley .. .. .. .. 145 Mikonui River .. .. .. .. 145 Historical Notes of the Discovery of Gold in the Northern Part of Westland .. 145-149 Examination of the District in connection with the Development of the Mineral Resources of Westland .. .. .. 149-155 Extracts from the Works of previous Observers who have dealt with the Geology of the Northern Part of Westland .. .. .. 155-158 Table of Formations present .. .. 158 I. Recent .. .. .. 159-162 Littoral Deposits .. .. .. 161 la. Pleistocene .. .. • .. 162 High-level Old River-channels and Terraces 162 11. Pleistocene and Younger Pleioeene 162-167 Extended Glacier deposits outside the limits of the mountains .. .. 163 River deposits formed prior to the advance of glaciers .. .. * .. 164 Marine gravels containing auriferous blacksand leads .. .. .. 166 Marine gravels of Sandy's Hill .. 167 111. Older Pleioeene and Upper Miocene 167-170 Humphrey's Gully beds .. .. 168 Old Man bottom (Moutero gravels of Geological Survey classification) .. 170 Brown sands .. .. .. 170 IV. Miocene Marine Tertiary Beds .. .. 170 Blue fossiliferous sands and marly clays .. 170 VI. Cretaceo-tertiary .. .. .. 171 X. Trias .. .. .. .171 XII. Carboniferous .. .. 171,172 Metamorphic (mica-schists) .. 172,173 Plutonic (granites) .. .. .. 173 Concluding Remarks .. .. 173-182 Appendix.—List of Minerals and Rock Specimens Collected during the Progress of the Examinations described in the foregoing Report 182-186 Samples Analysed .. .. 185-186 Metalliferous Workings .. .. 186-188 Manganese .. .. .. 186,187 Antimony .. .. .. .. 187 Quicksilver .. .. .. .. 187 Scheelite .. .. .. 187,188

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Page Mining Machinery .. .. 188,216 Otis Ore-crusher .. .•. 188,189 Carr's Disintegrator .. .. 189,190 Liihrig's Concentrating Plant .. 190-196 Mr. Newbery's report on .. 193-196 Grinding-pan for Ore .. .. .. 196 Complete Specifications of recent Inventions in Mining Machinery .. .. 196,203 Improvements in Amalgamating Machines having Rotary Mullers and stationary Pans 197-199 Improvements in Amalgamators .. 199-201 Improved Grinding, Separating, and Amalgamat-ing-pan .. .. .. 201-203 Dredger for the excavation of gold-bearing riverbeds, &c. .. .. .. .. 203 River-dredging in Otago, Paper on, by T. A. Rickards, Esq. .. .. 204-207 Electric Pumping - plant at Newton Colliery, Northumberland .. .. .. 207 Shedlock's Process for Refractory Ores .. 207, 208 A New Gold-extracting Process .. 208, 209 Loekwood-Chappel Process: Successful Application of the Treatment .. .. 209, 210 Jordan's Patent Centrifugal Gold Process 210, 211 Variations in tho Milling of Gold Ores,Otago: Paper by T. A. Rickards, Esq. .. .. 211-215 The Present Status of Stamp-milling .. 215,216 Different Methods of Extracting Gold from Ores 216-222 Gold-amalgamation Methods .. 216,217 Gold-amalgamation Methods .. 217-222 Some Points in Silver-mining by Amalgamation: Paper by C. H. Aaron, Esq. .. 222-227 Austin's Patent Amalgamator .. 227-228 Fine Gold Extraction, by Reading and Rigby's Patent Amalgamator .. .. .. .. 228 Chemistry, and Use of the Cyanide Process 228-233 Tho Cyanide Process in South Africa .. 233-237 Molloy's New Cyanide Process .. .. 237 The Cyanide Patents .. .. 237,238 Improvements in the Cyanide Process .. .. 238 Specification: Improvements in the Extraction of Gold and Silver from Ores and Compounds containing the same .. .. 238,239 Specification: Improvements in the Extraction of Gold and Silver from Ores and Compounds containing the samo, and in Apparatus applicable for Use in tho Treatment of such Materials by means of Solvents .. .. .. 239-241 Coal-mining .. .. .. 241-253 Whangarei .. .. .. 241,242 The Continental Method of Making Coke 242-250 Production of Coke in New South Wales 250-253 Mine-managers' Examinations: Questions used at the last Examinations under " The Coal Mines Act, 1891," and " The Mining Act, 1891" 253-260 List of Mine-managers who have obtained Certificates under the Mining and Coal-mines Acts of 1886 and 1891 .. .. .. 260-263 Summary of Works constructed .. 263-275 Statement showing the whole of the Different Classes of Works constructed by the Department, either by Direct Grants or by Subsidies to Local Bodies, during tho last Eleven Years (the votes for this purpose having been under the control of the Hon. the Minister of Mines), for the purpose of opening up the mineral belts throughout the colony and also for the development of the mining industry 263-265 List of Works undertaken wholly by the Mines Department, or by Subsidies, in progress on the 31st March, 1893 (Tables) .. .. 267-269 List of Works on Goldfields constructed wholly by the Mines Department, or by Subsidies to County Councils, Local Bodies, and Prospecting Associations, and completed prior to the 31st March, 1893 .. .. .. 269-275 Water-races, Sales of Water, &c. .. .. 276 Appendices: Appendix I.—Wardens' Reports. Appendix ll.—Statistical Tables, in connection with. Goldfields. Appendix 111. —Inspection of Mines. Appendix IV.—Statistical Tables, in connection with the Working of Coal-mines.

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