FERRY BUILDING, SAN FRANCISCO.

BULLETIN No. 23. San Francisco, April, 1902.

Science Library

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Stalactitic Limonite from Iron Mountain Mine, Shasta Co. Frontispiece.

Bully Hill Mines and Smelter, Shasta County

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Calcining furnaces of the Mountain Copper Company, Keswick,

Shasta County

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Mountain Copper Company's Smelter, Keswick, Shasta Co.

Surface mining plant of the Mountain Copper Company, in Slick

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Rock Cañon, with Iron Mountain at the right

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Blister copper from Bully Hill Smelter awaiting shipment

Tunnel entrance at Sugar Loaf Copper Mine, Shasta County

View of Bully Hill Copper Mines from the north

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Bully Hill, Shasta County, showing original tunnel opened in 1863

Geological sections according to available data, etc.

Sketch showing ore deposits of Iron Mountain Mine

Sketch showing ore bodies of Balaklala and Shasta King Mines

Smelter of the Mountain Copper Company, Keswick, Shasta Co.

McDougal roasting furnace, Keswick Smelter, Mountain Copper

Company, Shasta County

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Roasting stalls at Bully Hill Smelter, Shasta County

Smelter at the Bully Hill Mines, Shasta County

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Chute between Tunnels Nos. 2 and 3, electric power house and tim-

ber sheds, Bully Hill Mines

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View of Bully Hill Smelter from mouth of No. 3 Tunnel

Shasta King Mine of the Trinity Copper Company, Shasta Co.

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Gossan croppings and tunnel, Balaklala Mine, Shasta Co.
Ore dump and tunnel, Mammoth Copper Mine, Shasta Co.
Oom Paul Claims, gossan croppings, Shasta County
Blue Ledge group of copper mines, Siskiyou County
Preston Peak group of copper mines, Siskiyou County
Low Divide District, Del Norte County

Granite Group, Trinity County

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Croppings 60 feet wide, Island Mountain Copper Mine
Croppings 130 feet wide, Island Mountain Copper Mine

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Bowlder of copper ore 60 feet across base, 30 feet deep, 25 feet across

top, Island Mountain Copper Mine, Trinity County Bowlders of copper ore on north bank of Eel River, from outcrop 500

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feet distant, Island Mountain Copper Mine, Trinity Co.

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Gray Eagle Copper Claim, Colusa County

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Redwood Copper Queen Mine, Mendocino County

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Copper croppings, Williams Claims, Genesee, Plumas County

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Mountain on which is located the Duncan group of copper mines,

Genesee, Plumas County, near Flournoy's

Ideal cross-section of Spenceville formation

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Plant of the Spence Mineral Company, Spenceville
Sketch map of Mineral Hill group of mines
Cosumnes Copper Mine, El Dorado County
Contraband Tunnel, El Dorado County

Union Copper Mine, Copperopolis, Calaveras County
Penn Copper Mining Company's Mine, at Campo Seco
Smelting works of the Penn Mining Company, Campo Seco
Napoleon Copper Mine, Calaveras County

Green Mountain Copper Mine, Mariposa County

Dump of the Green Mountain Copper Mine, Mariposa County

At the Green Mountain Copper Mine, Mariposa County

Lone Tree Mine, Mariposa County

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Pocahontas Copper Mine, Mariposa County

White Rock, Mariposa County

White Rock Mine, Mariposa County

La Victoria Mine, Mariposa County

Buchanan Copper Mine, Madera County

California Copper Company's property, Daulton ranch, Madera County

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California Copper Company's Smelter, at Madera

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Mining plant of the Copper King Mining Company, limited, Fresno
County

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Shipping station of the Copper King Mining Company, limited, at Deering, on S. P. R. R.

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Smelter of the Copper King, limited, at Seal Bluff Landing, Contra Costa County

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Converter furnaces in course of erection, Copper King, limited,
Seal Bluff Landing, Contra Costa County

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Copper Mountain Mining Company's claims, Tulare County

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