Prof. Davidson thinks all the authorities are against Dr. Dall, who
attributes the warm current he observed on the American coast to water
from the Yukon River and to the large expanse of shallow water exposed
to the sun's rays. As Dall's observations only covered a few days of
possibly exceptional weather, and the whalers and Captain Hooper's cover
vastly longer periods, and whalers all say it is a pretty hard thing to
beat southward through Behring's Strait, owing to the northerly current
setting into the Arctic, we are forced to the conclusion that Dr.
Dall has mistaken the exception for the rule, and his conclusions are
therefore erroneous. When, in 1824, Wrangell went north, he, like
others, always found broken ice and considerable open water. In 1867,
when Capt. Thomas Long made his memorable survey of the coast of
Wrangell Land, the season was an exceptionally open one, and in
California we had heavy rains, extending into July.
* * * * *
EXPERIMENTAL GEOLOGY.
ARTIFICIAL PRODUCTION OF CALCAREOUS PISOLITES AND OOLITES.
Mr. Stanislas Meunier communicates to _Le Nature_ an account of some
interesting specimens of globular calcareous matter, resembling
pisolites or peastones both in appearance and structure, which were
accidentally formed as follows: The Northern Railway Company, France,
desiring to purify some calciferous water designed for use in steam
boilers, hit upon the ingenious expedient of treating it with lime water
whose concentration was calculated exactly from the amount of lime
held in the liquid to be purified.
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