Placer Mining - Columbia, Tuolumne Co., interior of the dump-box.

Placer Mining - Columbia, Tuolumne Co., from the top of the dump-box.

Placer Mining - Columbia, Tuolumne Co., from the top of the dump-box.

Placer Mining, Columbia, Tuolumne Co. The Columbia Claim.

Placer Mining in Columbia Gulch, general views of the Columbia Claim, Tuolumne County.

Placer Mining - In the Boulder Range, Columbia, Tuolomne Co.

A Miner, "panning out."

Placer Mining, Brown's Flat, Tuolumne County.

Placer Mining at Volcano, Amador County, working in the dump-box.

Placer Mining at Volcano, Amador County.

Placer Mining at Volcano, Amador County, The dump and sluice.

Hydraulic Mining - The Palm Claim, Timbuctoo, Yuba County.

Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Hydraulic Mining - Timbuctoo Diggings, Yuba Co.

Hydraulic mining - the sluice.

Hydraulic mining - washing down the bank into the sluice.

Hydraulic Mining - washing down the bank into the sluice.

Hydraulic mining - behind the pipes.

Hydraulic mining - behind the pipes.

Hydraulic mining - The Palm claim, Timbuctoo, Yuba County.

Hydraulic mining - The Palm claim, Timbuctoo, Yuba County.

Hydraulic mining - The gate, Yuba County.

Hydraulic Mining.

Hydraulic Mining, Cal.

Primitive mining, the old rocker. C.E. Watkins posing as miner.

Hydraulic Mining, Gold Run C.P.R.R. Cal.

Hydraulic Gold Mining, California.

Pipes that supply the water for hydraulic mining.

Group portrait of men posed on cars of mine railroad.