enough to give it a fair and reasonable chance to do its work.

The Alpine glaciers move--that is granted, now, by everybody.
But there was a time when people scoffed at the idea;
they said you might as well expect leagues of solid rock
to crawl along the ground as expect leagues of ice to do it.
But proof after proof as furnished, and the finally the
world had to believe.

The wise men not only said the glacier moved, but they
timed its movement. They ciphered out a glacier's gait,
and then said confidently that it would travel just
so far in so many years. There is record of a striking
and curious example of the accuracy which may be attained
in these reckonings.

In 1820 the ascent of Mont Blanc was attempted by a Russian
and two Englishmen, with seven guides. They had reached
a prodigious altitude, and were approaching the summit,
when an avalanche swept several of the party down a
sharp slope of two hundred feet and hurled five of them
(all guides) into one of the crevices of a glacier.
The life of one of the five was saved by a long barometer
which was strapped to his back--it bridged the crevice
and suspended him until help came. The alpenstock
or baton of another saved its owner in a similar way.
Three men were lost--Pierre Balmat, Pierre Carrier,
and Auguste Tairraz. They had been hurled down into the
fathomless great deeps of the crevice.