Obviously, the order and method of such
movements as are just beginning to develop to our apprehension among
the Pleiades will not prove easy to divine.--_A.M. Clerke, in Nature._
* * * * *
DEEP SEA DREDGINGS: EXAMINATION OF SEA BOTTOMS.
By THOMAS T.P. BRUCE WARREN.
I believe Prof. Ehrenberg was one of the first to examine,
microscopically, deep sea dredgings, some of which were undertaken for
the Atlantic cable expedition, 1857.
I propose to deal with the bottoms brought up from tropical waters of
the Atlantic, a few years ago, during certain telegraph cable
operations. These soundings were made for survey purposes, and not for
any biological or chemical investigations. Still I think that this
imperfect record may be a useful contribution to chemical science,
bearing especially on marine operations.
Although there is little to be added to the chemistry of this subject,
still I think there are few chemists who could successfully make an
analysis of a deep sea "bottom" without some sacrifice of time and
patience, to say nothing of the risk of wasting a valuable specimen.
The muds, clays, oozes, etc., from deep water are so very fine that
they pass readily through the best kinds of filters, and it is
necessary to wash out all traces of sea water as a preliminary.
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