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The Tangential Impulse Water Wheel in California Gold Mining History—Part II

Even before Pelton relocated in San Francisco in 1888, many other competitive foundries and machine shops chose to enter the water wheel market. These firms were already busy with the mining trade, producing hoists, stamp mills, ore carts, Cornish pumps, crushers, grinders, compressors and drills.

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Over the Divide


H. Mason Coggin    
    1938-2000

Nome Offshore Dredging Creates Challenges


The Alaska state government has been trying to keep up with and maybe even stay on top of the situation by studying the problems associated with rapid growth and how to solve them.

Melman on Gold & Silver


Yet another term has entered the lexicon of investment analysis and that term is “Fallen Angels.” No, we are not referring to religious icons or celestial bodies. Rather, the investment community has dubbed the debt instruments of once-prosperous companies that have now fallen on hard times with that moniker.

Mining in Sonora, Mexico


So you want to do some gold mining in Mexico. What do you need, where do you go, how do you begin? You begin before you even cross the border.

The Pedro Gold Dredge


The decision was made to move the dredge intact, a massive undertaking indeed. The goal was to move it only one mile to the Busby’s Chicken Gold Camp, but what a mile that was to be.

River Dredging vs. Creek Dredging—Part I


As I started walking down to the river one chilly morning, the mist was hanging over the calm portions of the water like a white cotton blanket. This scene got me to thinking about why the river was like that—the deep pools, boulder fields, gravel bars, the effects of how much water was moving at any given time along the watercourse—and most of all the relationship all these things have on where I will be able to find gold.

Gold in Sonora


The state of Sonora, slightly smaller in area than Utah, lies in-northwestern Mexico, adjoining Arizona to the south. It is characterized, on the east, by a high volcanic plateau, the Sierra Madre Occidental, which forms its boundary with Chihuahua.

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