Definitions
from The Century Dictionary.
- noun In rope-drilling, a cylinder, provided with a valve at the bottom, which is lowered into the drill-hole from time to time to remove the pulverized rock, or sludge. Also called
sludger . - noun A powerful water-jet with an annular nozle inclosing a tube which is sunk in loose sand, and operates as an injector to lift the sand with the water which discharges back through the tube.
Etymologies
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Examples
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Moreover, he was the first person to run his pipes for discharging the sand, not through the shaft, but through the masonry itself; and he invented a very simple and effectual new sand-pump, which was worked by natural forces without machinery.
James B. Eads Louis How 1910
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