The Technical World Magazine, Volume 10Technical World Company, 1908 |
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Page 40
... ROCK BY HYDRAULIC MEANS . SEEKING NATURAL RUBIES NEAR MOGOK . BURMAH . THE SHOTGUN. lumps , and the balance is separated from the broken rock by washing , its greater weight causing it to sink in water to the bottom of the troughs used ...
... ROCK BY HYDRAULIC MEANS . SEEKING NATURAL RUBIES NEAR MOGOK . BURMAH . THE SHOTGUN. lumps , and the balance is separated from the broken rock by washing , its greater weight causing it to sink in water to the bottom of the troughs used ...
Page 142
... rock as closely as possible and anchored . With great difficulty Kennedy and Wil- son , two of the sandhogs who were ex- perts with the air drill , were landed on the rock in a surf boat . A steel bar was driven into a crevice and to ...
... rock as closely as possible and anchored . With great difficulty Kennedy and Wil- son , two of the sandhogs who were ex- perts with the air drill , were landed on the rock in a surf boat . A steel bar was driven into a crevice and to ...
Page 224
... ROCK DRILL DRIVEN BY GASOLINE A DRILL containing a complete power plant for its operation is the essential feature of the gasoline rock drill shown in the accompanying pictures . This drill is the invention of a manufacturer of gas ...
... ROCK DRILL DRIVEN BY GASOLINE A DRILL containing a complete power plant for its operation is the essential feature of the gasoline rock drill shown in the accompanying pictures . This drill is the invention of a manufacturer of gas ...
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