Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)
Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 376
ad been baffled in their attempts to sink a shaftthrough 1Q7 feet of quicksand at the Centrum mine, near Berlin, Germany.Dr. Poetsch sunk sixteen pipes in a circle around the proposed location of theshaft, and in thirty-three days had succeeded in producing a frozen circularwall six feet thick,… … MANCHESTER SHIP CANAL the pipes can be thawed loose from the wall of ice by simply circulating a hotliquid instead of a cold one. The pipes can then be redrawn uninjured, andused over again — a consideration of no small advantage. The process is notcheap. It would seldom, if ever, be used where the…
Progress · Inventions
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