Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . about an inch in diam-eter, through which, at regular intervals, escapes a blast of hot air with alight wreath of smoke, accompanied by a regular noise. This hole hadbeen noticed by Doctor Wislizenus, a gentleman who several years sincepassed by this place, and who remarked, with very nice observation, thatsmelling the gas which issued from the orifice produced a sensation of gid-diness and nausea. Mr. Preuss and myself repeated the observation, andwere so well
Report of the exploring expedition to the Rocky Mountains in the year 1842, and to Oregon and north California in the years 1843-44 . about an inch in diam-eter, through which, at regular intervals, escapes a blast of hot air with alight wreath of smoke, accompanied by a regular noise. This hole hadbeen noticed by Doctor Wislizenus, a gentleman who several years sincepassed by this place, and who remarked, with very nice observation, thatsmelling the gas which issued from the orifice produced a sensation of gid-diness and nausea. Mr. Preuss and myself repeated the observation, andwere so well satisfied with its correctness, that we did not find it pleasant tocontinue the experiment, as the sensation of giddiness which it producedwas certainly strong and decided. A huge emigrant wagon, with a largeand diversified family, had overtaken us and halted to noon at our encamp-ment; and, while we were sitting at the spring, a band of boys and girls, * AXA1TSIS. Carbonate of lime - - - - - - -92 55 Carbonate of magnesia ------- Oxide of iron - - - - - - - Silica ^ Alumina > 5,9s Water and loss j illH 0P fi J j\j 0 D, .scale. One Mi!,- I,, 137 [ 174 ] with two or three young men, came up, one of whom I asked to stoopdown and smell the gas, desirous to satisfy myself further of its effects. Buthis natural caution had been awakened by the singular and suspiciousfeatures of the place, and he declined my proposal decidedly, and with afew indistinct remarks about the devil, whom he seemed to consider thegenius loci. The ceaseless motion and the play of the fountain, the redrock, and the green trees near, make this a picturesque spot. A short distance above the spring, and near the foot of the same spur, is avery remarkable yellow-colored rock, soft and friable, consisting principallyof carbonate of lime and oxide of iron, of regular structure, which is prob-ably a fossil coral. The rocky bank along the shore between the Steam-boat spring and our encam
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