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LETTER OP TRANSMITTAL
SUMMARY OF NEWER DREDGING FIELDS IN CALIFORNIA
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acres annual average bedrock Bibliography black sand brick Bulletin 38 Calaveras California canon cement cent chromite clay Commercial production conceal output concentrate copper cost Creek crude cubic foot buckets cubic yards decrease deposits district dredger Dredging Company feet field flask follows forks of Salmon Geological gold and platinum Gold Dredging grade ground Gulch Hayfork Humboldt hydraulic mines increase industry Inyo iridium Kern Klamath River limestone magnesite manganese material Mineral Production mineral resources Mineralogist Mineralogist Reports Mining Bureau miscellaneous stone Mountains Napa County Nevada North Fork nuggets operations Oroville osmiridium osmium ounces of platinum placer platinum platinum metals potash production for 1918 Production of California quartz quicksilver recovery rock Sacramento San Bernardino San Bernardino County San Francisco Santa Sawyers Bar serpentine Shasta County silver Siskiyou sluice South Fork stream Substance Amount Value Tons Value Total value Trinity River tungsten United yield Yuba