. Haynes' guide to Yellowstone Park. ge overFirehole River nearby allows one to easily visit thislocality. The principal attraction in Biscuit Basin isSapphire Pool, whose highly ornamented margin sug-gested the basins rather odd name. Hundreds of smallsymmetrical, biscuit-like knobs of olive-green forma-tion surround the spring, which is of the variety knownas pulsating or breathing springs (geysers in fact).The constant ebb and flow of its waters have producedthis peculiar formation, from one to another of whichone must pick his way in order to get a good view ofthe pool itself. A few feet t
. Haynes' guide to Yellowstone Park. ge overFirehole River nearby allows one to easily visit thislocality. The principal attraction in Biscuit Basin isSapphire Pool, whose highly ornamented margin sug-gested the basins rather odd name. Hundreds of smallsymmetrical, biscuit-like knobs of olive-green forma-tion surround the spring, which is of the variety knownas pulsating or breathing springs (geysers in fact).The constant ebb and flow of its waters have producedthis peculiar formation, from one to another of whichone must pick his way in order to get a good view ofthe pool itself. A few feet to the west is Jewel Geyser, whose eruptions occur with the re-markable frequency of from three to five minutes,throwing its jets of water to a height of twenty-five orthirty feet. Scarce 500 feet further west are the BlackPearl and Silver Globe. The former has a beautifulbasin, studded thickly with black pearls, each aboutone-quarter of an inch in size. A curious feature of thislittle spouter is the fact that its formation surrounds. 78 YElvIvOWSTONi: NATIONAI, PARK. the roots and stump of a tree, completely incrustingthe same with its rich, black ornamentations. The Silver Globe derives its name from the constantrising to its surface of large, silvery globules or bubblesof gas or steam, which, of course, immediately disap-pear on reaching the air. UPPER GEYSER BASIN TO YELLOWSTONELAKE. The third day of the regular tour of the Park isconsumed in traveling from the Geyser Basin to Yel-lowstone Lake. The route is over the summit of thecontinental divide, near Shoshone Lake, the head wa-ters of Lewis Fork of Snake River, a branch of theColumbia that empties into the Pacific Ocean; and in afew miles returns to the Atlantic Slope at YellowstoneLake, whose waters reach the ocean through the Yel-lowstone, Missouri and Mississippi Rivers. Leaving the geysers, the road follows up the Madi-son River (being the same stream known as the Fire-hole River during its meandering of the Geyser B
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