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Malakoff, North Bloomfield Gravel Mining.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Malakoff Diggings, North Bloomfield Gravel Mining.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Malakoff Diggings, North Bloomfield Gravel Mining.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Malakoff Diggings, North Bloomfield Gravel Mining.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Malakoff Diggings from Columbia Hill, North Bloomfield Gravel Mining.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Union Diggings, Columbia Hill, Nevada Co.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Digging, Nevada County, Cal.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Malakoff Diggings, North Bloomfield Gravel Mining.

Subjects: California, Gold miners, Hydraulic mining, Mineral industries, Environmental aspects, Malakoff Diggins State Historic Park (Calif.), Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining - Behind the Pipes, in the Kennebeck Claim, Birchville, Nevada County.

Subjects: California, Hydraulic mining, Mineral industries, Environmental aspects, Nevada County (Calif.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Placer Mining - Columbia, Tuolumne Co., from the top of the dump-box.

Subjects: California, Tuolumne County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Placer Mining - Columbia, Tuolumne Co., from the top of the dump-box.

Subjects: California, Tuolumne County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Placer Mining - In the Boulder Range, Columbia, Tuolomne Co.

Subjects: California, Gold mining, Tuolumne County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining - The Palm Claim, Timbuctoo, Yuba County.

Subjects: California, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Subjects: California, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Subjects: California, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Subjects: California, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic mining - behind the pipes.

Subjects: California, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic mining - behind the pipes.

Subjects: California, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic mining - The Palm claim, Timbuctoo, Yuba County.

Subjects: California, Gold mining, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic mining - The Palm claim, Timbuctoo, Yuba County.

Subjects: California, Gold mining, Yuba County (Calif.), Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining.

Subjects: California, California, mining, Gold miners, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining, Cal.

Subjects: California, California, mining, Pipes (Conduits), Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining, Gold Run C.P.R.R. Cal.

Subjects: California, California, mining, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Gold Mining, California.

Subjects: California, California, mining, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic Mining, Cal.

Subjects: California, California, mining, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Gold Bearing Pyramid, California.

Subjects: California, California, mining, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]
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Hydraulic mining in California.

Subjects: California, California, mining, Gold mining, Hydraulic mining, Mineral industries, Environmental aspects
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]