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tide eadi drop removes? It must be so small as
to remain suspended amidst the agitation of the
great rolling breakers of the Atlantic swell, and
the work done shows how great must be the
aggregate of these. Though the water is nowise
mudded, but beautifully bright and clear, it is far
less transparent than pure water, and coloured as
I have stated. The immeasurably fine particles of
dark rock must be there ; their colour is there, and
it is a fair assumption that the coexistence is due
to causation, especially when confirmed by so
many other cases.
The most remarkable of these is afforded by the
inky, or rather pitchy, blackness of such lakes as
the Jolster Yand, the pools of the river, the other
lakes hereabouts, and the multitude of similar
lakes and pools in the Teilemark, in Scotland,
Ireland, and other regions where the waters flow
through peat bogs.
Small quantities of such water are brownish ;
the shallow torrents appear like rivers of tea, or
very clear weak coffee ; but when deep, and
especially seen in shade, are as black as pitch.
Their colour is, I believe, actually due to a kind
of pitch, to the slightly soluble hydrocarbon
existing in peat, and easily separable from it by
distillation.
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