Bulletin, Issue 78

Front Cover
California State Mining Bureau, 1918 - Geology
 

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Contents

Geological map of Sulphur Creek District
32
MINES AND PLANTS ALPHABKTICALLY BY COUNTIES
35
Plan and elevation of Abbott mine
54
Photographs Page 11 Exfoliation of basalt at Sulphur Bank mine
65
Hot springs in bottom of Western Cut at Sulphur Bank mine
66
Patriquin mine near Parkfield
74
Bins and furnace plant at the Etna mine
79
Geological map of Corona mine
82
Sketch of La Joya mine workings
84
F urnncos at La Joya mine
85
Dumps of lowgrade ore at Oat Hill mine
90
Serpentine surface near New Idria
94
Geological map of Stayton District
96
I8 Rotary furnace Aurora mine
100
Old and new prospect tunnels Florence Mack mine
104
Characteristic outcrops at Los Picachos Peak Hernandez mine
106
Panoramic view of New Idria mine plant and town
108
Outline of orebody New Idrla mine
110
Flashlight view in squareset stope New Idria mine
111
Ore trains at New Idria mine
113
New Idria mine showing open cuts and dumps
114
San Carlos mine open cut above No 2 level
116
Blower and stack from fineore furnace New Idria mine
118
Geological map of quicksilver districts in northwestern San Luis Obispo County
124
Map of Cambria mine workings
129
Detail of tramway and orebin Cambria mine
130
Old coarseore quicksilver furnace erected 1873 at Keystone mine
134
28a Klau mine showing old stopes and drifts exposed by later opencut opera lions
136
Open cuts at Oceanic mine
141
Microphotograph of dlorttegabbro at the Oceanic mine
142
Plant of Oceanic mine
143
Tramway unloading terminal at Oceanic mine
145
Open cut at MilburnMcAvoy Los Prlttos mine
151
Guadalupe mine
154
Map of New Almaden mine
161
Cottrell dust precipitator or hot treater at Senator mine
165
35a New 90ton Scott furnace at Senator mine
166
MINES AND PLANTSContinued p
168
Geologic map of St John s mine
173
Map of underground workings 160foot level St John s mine
176
St John s mine near Vallejo
177
Map of underground workings St Johns mine
178
Cloverdale mine
184
Pipe retort furnace 211
187
Great Eastein mine near Guerneville
188
Livingston furnace under construction at La Joya mine
216
Lander s continuous retort
218
Exeli coarseore furnace
220
Neate coarseore furnaces at the Bella Union mine
223
New Idrla coarseore furnace
224
Livermore furnace at Cloverdale mine
226
Ray electric oilburners on Livermore furnace at Cloverdale mine
227
Side view of 50ton Scott furnace at Oceanic mine
229
Plan of HUttnerScott furnace
231
Top of HuttnerScott furnace
232
Discharge of Scott furnace
233
Sketch of Scott furnace section
237
Quicksilver in earth and sand under site of old furnaces at New Almaden
242
Chart showing condensation temperatures for mercury vapor in fur
246
Rotary oredrier above Scott furnace at Socrates mine
247
New rotary quicksilver furnace at New Idria mine
248
XXXVIB Flow sheet of New Idria revolving furnace plant
249
Herreschoff multiplehearth furnace at Senator mine
251
Top or dryinghearth of Herreschoff furnace
252
Cottrell precipitator or cold treater at Senator mine
253
Scott furnace and condensers at Klau mine
254
Ore drier at St John s mine
255
Knox ironclad condenser
256
Condensers at New Mercy Pacific mine
257
Barrell condensers at New Idria mine
258
Round wooden condensers at New Idria mine
259
Rectangular wooden condenser and flue at Oceanic mine
260
Condenser pipes of JohnsonMcKay retorts at Patriquin mine
261
Condenser system on JohnsonMcKay retorts at Sulphur Bank mine
262
Scotts brick condenser plant
263
Condensers and vitriliedpipe flues at Etna mine
265
Cleaning up one of the new wooden condensers at New Idria
274
Soot mill at New Idria mine
275
QUICKSILVER ASSAYS
277
Whltton quicksilver apparatus
281
Whltton quicksilverassay apparatus showing component parts
283
Whltton quicksilverassay apparatus assembled
284
Chapter 2
286
Hyde Slide laboratory flotation machine
300
PRACTICAL APPLICATIONS OF CONCENTRATION TO QUICKSILVER ORES
329
Plan and elevation of concentrating system Manzanita mine
331
Riffle unit Oat Hill mine
334
ESTIMATES OF CONCENTRATION COSTS
349
RE CALIFORNIAN OCCURRENCES ON GEOLOGY MINERALOGY
358
INDEX
367

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