Ice-Caves of France and SwitzerlandBrowne, G. F. (George Forrest)
Science
Ice-Caves of France and Switzerland
Browne, G. F. (George Forrest)
Ice caves
The glacière was in a state of ruin. Only the right-hand column, not
speaking heraldically, was standing, the others lying in blocks frozen
hard together on the ground. The column which still stood was much
shrunken, and seemed too small for its fissure, the sides of which it
scarcely touched. The wind blew down the entrance slope so
determinedly, that a candle found it difficult to live at the bottom
of the first cave; and a portion of the current blew into the
glacière, and in its sweep exactly struck the fallen columns, the
edges of which were already rounded by thaw. Much of this must be
attributed to the recent opening of the second shaft (p. 5), which
admits a thorough draught through the first cave, and so exposes the
glacière to currents of warmer air; and I should expect to find that
in future the ice will disappear from that part of the cave every
summer, [7] whereas in 1861 we found it thick and dry (excepting a few
small basins containing water) and evidently permanent, in the middle
of a very hot August. The low part of the cave was so completely
protected from the current, that the candle burned there quite
steadily for an hour and a half: still, like the others, the column at
that end of the glacière was broken down, and it therefore became
necessary to attribute its fall to some other agency than the current
of external air. There had been a very large amount of rain, and the
surface of the rock in the fissures was evidently wet; so I have no
doubt that the filtering through of the warm rain-water had thawed the
upper supports of the ice-cascades, and then, owing to their slightly
inclined position, the pedestal had not provided sufficient support,
and so they had fallen. One of them, perhaps, had brought down in its
fall the free column, which had stood two days before on its own base,
without any support from the rock. Very probably, too--indeed, almost
certainly,--the fall of the large mass of rock, which once formed the
bottom of the basin on the north side of the road, has affected the
old-established fissures, by which rain-water has been accustomed to
penetrate in small quantities to the glacière, so that now a much
larger amount is admitted. On this account, there will probably be a
great diminution of the ice in the course of future summers, though
the amount formed each winter may be greater than it has hitherto
been. Constant examination of other columns and fissures has convinced
me, that, before the end of autumn, the majority of the glacières will
have lost all the columns which depend upon the roof for a part of
their support, or spring from fissures in the wall; whereas those
which are true stalagmites, and are self-supporting, will have a much
better chance of remaining through the warm season, and lasting till
the winter, and so increasing in size from year to year. Free
stalagmites, however, which are formed under fissures capable of
pouring down a large amount of water on the occasion of a great flood
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account