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Lighting the Way Underground 1860-1940s

Man has toiled for thousands of years underground to unlock the treasures that Mother Earth has buried just beyond view. A source of light was of the utmost importance to the miner and many developments evolved through the passage of time.

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Ask the Experts


Q: Does anyone know of an electrowinning instrument that will plate (heavy plate) rhodium and iridium? I have both in solution. (Solution content = 262.9 oz/ton of iridium; 14.9 oz/ton rhodium.)
If I have precious metals in solution in bulk, say 620 to 1,000 gallons, is there a facility to extract the precious metals out? If so, can each be isolated?

Understanding Large Gold Deposit Types: Discovering New Mines


The other opportunity that I see is in seeking unusual types of deposits. Specifically, the prospector would be searching for the stuff no one (or almost no one) is searching for. These deposits are effectively hiding in plain view.

Another Prospecting Adventure: Coulterville


What also helped keep Coulterville alive was the fact that the town itself happened to be sitting on top of one of the richest veins in the Mother Lode. The ledge itself was three hundred feet wide.

Safety With a Tax Deduction


As an employer, every mining operation, large or small, is responsible for protecting the safety and health of its employees. Safety is also good business. An effective safety and health program can save $4 to $6 for every $1 invested. It’s the right thing to do, and doing it right pays off in lower costs, increased productivity, and higher employee morale.

Mohave Mountain Placers, Arizona


There are literally hundreds of dry placer deposits in the Sonoran and Mohave Deserts of western Arizona. Many of these placer gold deposits are not described in any published books, bulletins, or reports, though placer gold enthusiasts know where...

Mining Stock Quotes and Mineral & Metal Prices


Wilfley Tables—Repair, Rebuild & Set Up


I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...

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The Bawl Mill   • Over the Divide   • Our Readers Say   • Desert Phone Trashed   • ICMJ Elected Prospecting Magazine of 1999   • Advertising Manager Leaving ICMJ   • Guest Editorial—California "Special" Dredge Permits in Jeopardy   • The Search Continues   • Guest Editorial: U.S. Government—Like Nobody's Business   • Circulation and Collections Manager Leaving ICMJ   • Company Notes   • House Chair Requests Records on Forest Decision   • BLM Wants to Withdraw South Pass Public Land   • Silverton Preserving Lofty Symbol of Mining Era   • Hijackers Make Off With 660 Pounds of Gold   • Prospecting With a Magnetometer   • 1999 Tables of Content   • Millie's Tailings   • Picks & Pans: Crevicing & Sniping for Placer Gold   • Looking Back   • Gold in Sonora   • Forest Service Boss Quits in Bull Trout Flap   • Melman on Gold & Silver   • European Gold Miners Seek Clarification Letter   • Mining Stock Quotes and Mineral & Metal Prices   • Squeezing Diamond Into Graphite

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