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she has
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pilliding will long pe
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8.
were also
48
operations within such a confined space and from such depths
a source of great trouble. The material passed through consisted of clay and sill intermingled with shello and with occa- -sional layers of sand and shells. Just before reaching the rock, a layer of beach bouchers, about 2 feet in depth, was passed through. The boulders were of varying size, down to shingle, -sister
of very hard stone and were densely packed together. The rate at which water entered the wall from the layer of boulders precluded the possibility of primping it day in order to admit of an actual. inspection of the bottom.
Lou-
Work was then begun upon Well Me 3 and, after sinking it to a depth of 42 feet through clay, silt and sand, the stratum of beach boulders above described was again encountered. Sinking operations were continued and, after passing through about 10 feet of boulders, sand was again met with and it was not until the well had reached a depth of 584 feet that rock was Xere also it was
finally found. found impossible to day the
bottom by fumping
and the extent and nature of
the rock were ascertained by feeling it carefully
all over. Pieces were also broken off and compared!
with the rock above water level at "the sides of the 叶
this.com
comparism,
bay, and, as the result
seems no room to doubt that rock' in situ baa Over a small portion of he
been reached.
area (6 feet diameter) covered by the well, the
rock dipped away to greater depth. The sinking of this well has just been completed.
Whilst
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