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storm, wore a very Wild appearance. Round the horizon it
was of steely brilliancy, while reddish cumuli. and cirri
floated southward. When the sky was quenched behind
them these floating masses seemed like dull embers sud-
denly blown upon; they brightened like a fire. In the
Alps we have the most.magnificent examples of crimson
clouds and snows, so that the effects just referred to may
be here studied under the best possible conditions. On
August 23, 1869, the evening Alpenglow was very fine,
though it did not reach its maximum depth and splendor.
Toward sunset I walked up the slopes to obtain a better
View of the Weisshorn. The side of the peak seen from the
Bel Alp, being turned from the sun, was tinted mauve ;
but I wished to see one of the rose-colored buttresses of the
mountain. Such was visible from a point a few hundred
feet above the hotel. The Matterhorn also, though for the
most part in shade, had a crimson projection, while a deep
ruddy red lingered along its western shoulder. Four dis-
tinct peaks and buttresses of the Dom, in addition to its
dominant head—all covered with pure snow—were red-
dened by the light of sunset. The shoulder of the Alphu-
bel was similarly colored, while the great mass of the Flet-
schorn was all a-glow, and so was the snowy Spine of the
Monte Leone.

Looking at the Weisshorn through the N icol, the glow
of its protuberance was strong or weak according to the
position of the prism. The summit also underwent a
change. In one position of the prism it exhibited a pale
White against a dark background; in the rectangular posi-
tion, it was a dark mauve against a light background. The
red of the Matterhorn changed in a similar manner; but
the whole mountain also passed through striking changes
of definition. The air at the time was filled with a silvery
haze, in which the Matterhorn almost disappeared. This
could be wholly quenched by the Nicol, and then the

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