WHEN an attempt is made to sink a shaft in very watery deposits of gravel, sand, and mud in the ordinary way—that is, by digging out the solid matter by hand and pumping the water to keep the bottom ...

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MR. RIEMR is one of the leading German authorities on sinking, and a translation of his valuable treatise forms an addition to English technical literature that is specially welcome in view of the ...

DRILLINGS Workers drilling the next round to blast the bottom cut of the 850 m station FRESH AIR The 850 m station and current bottom of Shaft 1 with ventilation column and kibble INSPECTION Workers ...