air and about as varied
a mountain country as the tropic sun shines on. It has mountains up
which one may climb from tropic forest jungles into open, pine-forested
parks, and up again into the dense tropic forest, with its drapery
of vines, its varied hanging orchids, and its graceful, lilting fern
trees. It has mountains forested to the upper rim on one side with
tropic jungle and on the other with sturdy pine trees; at the crest
line the children of the Tropics meet and intermingle with those of
the temperate zone. There are gigantic, rolling, bare backs whose only
covering is the carpet of grass periodically green and brown. There
are long, rambling, skeleton ranges with here and there pine forests
gradually creeping up the sides to the crests. There are solitary
volcanoes, now extinct, standing like things purposely let alone when
nature humbled the surrounding earth. There are sculptured lime rocks,
cities of them, with gray hovels and mansions and cathedrals.

The mountains present one interesting geologic feature. The
"hiker" is repeatedly delighted to find his trail passing quite
easily from one peak or ascent to another over a natural connecting
embankment. On either side of this connecting ridge is the head of a
deep, steep-walled canyon; the ridge is only a few hundred feet broad
at base, and only half a dozen to twenty feet wide at the top. These
ridges invariably have the appearance of being composed of soft earth,
and not of rock. They are appreciated by the primitive man, who takes
advantage of them as of bridges.

The mountains are well watered; the summits of most of the mountains
have perpetual springs of pure, cool waters. On the very tops of some
there are occasional perpetual water holes ranging from 10 to 100 feet
across. These holes have neither surface outlet nor inlet; there are
two such within two hours of Bontoc pueblo. They are the favorite
wallowing places of the carabao, the so-called "water buffalo,"[6]
both the wild and the half-domesticated animals.

The mountain streams are generally in deep gorges winding in and out
between the sharp folds of the mountains. Their beds are strewn with
bowlders, often of immense size, which have withstood the wearing of
waters and storms. During the rainy season the streams racing between
the bases of two mountain ridges are maddened torrents. Some streams,
born and fed on the very peaks, tumble 100, 500, even 1,500 feet
over precipices, landing white