. L'Amérique pittoresque; ou, la terre dans laquelle nous vivons. Une délimitation par plume et crayon des montagnes, des rivières, des lacs, des forêts, des chutes d'eau, des rives, des cañons, des vallées, des villes, et d'autres caractéristiques pittoresques de notre pays . l'eau en plus, dont les tempera-tures sont cent quatre-vingt, cent soixante-dix, cent quatre-vingt-quatre-quatre, et cent cinquante-cinq degrés. Dans les réservoirs, où l'eau NOTRE GRAND PARC NATIONAL. 309 s'enfume avec force considérable, la température est seulement quatre-vingt-dix-six degrés, montrant thatthe barbotage était dû à la fuite de gaz. Les bulles se tiennent

• Contributeur: Reading Room 2020 / Alamy Banque D'Images
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. Picturesque America; or, The land we live in. A delineation by pen and pencil of the mountains, rivers, lakes, forests, water-falls, shores, cañons, valleys, cities, and other picturesque features of our country . urplus water into it, the tempera-tures of which are one hundred and eighty, one hundred and seventy, one hundred andeighty-four, and one hundred and fifty-five degrees. In the reservoirs, where the water OUR GREAT NATIONAL PARK. 309 boils up with considerable force, the temperature is only ninety-six degrees, showing thatthe bubbling was due to the escape of gas. The bubbles stand all over the surface.About twenty feet from the last is a small mud-spring, with an orifice ten inches indiameter, with whitish-brown mud, one hundred and eighty-two degrees. Another basinnear the last has two orifices, the one throwing out the mud with a dull thud aboutonce in three seconds, spurting the mud out three or four feet; the other is content toboil up quite violently, occasionally throwing the mud ten to twelve inches. This mud, which has been wrought in these caldrons for perhaps hundreds of years, is so fine andpure that the manufacturer of porcelain-ware would go into ecstasy at the sight. The. Hot-Spring Cone. contents of many of the springs are of such a snowy whiteness that, when dried incakes in the sun or by a fire, they resemble the finest meerschaum. The color of themud depends upon the superficial deposits which cover the ground, through which thewaters of the springs reach the surface. They were all clear hot springs originally, per-haps geysers even ; but the continual caving-in of the sides has produced a sort of mud-pot, exactly the same as the process of preparing a kettle of mush. The water is atfirst clear and hot; then it becomes turbid from the mingling of the loose earth aroundthe sides of the orifice, until, by continued accessions of earth, the contents of the basinbecome of the consistency of thick mush, and, as the gas bursts up through it,

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