The direction of the slide is sometimes straight, and
sometimes zig-zag, with an inclination of from 10 degrees to 18
degrees. It is often carried along the sides of hills and the
flanks of precipitous rocks, and sometimes passes over their
summits. Occasionally it goes under ground, and at other times it
is conducted over the deep gorges by scaffoldings 120 feet in
height.
The boldness which characterizes this work, the sagacity and
skill displayed in all its arrangements, have excited the wonder
of every person who has seen it. Before any step could be taken
in its erection, it was necessary to cut several thousand trees
to obtain a passage through the impenetrable thickets. All these
difficulties, however, were surmounted, and the engineer had at
last the satisfaction of seeing the trees descend from the
mountain with the rapidity of lightning. The larger pines, which
were about a hundred feet long, and ten inches thick at their
smaller extremity, ran through the space of three leagues, or
nearly nine miles, in two minutes and a half, and during their
descent, they appeared to be only a few feet in length.
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