. Guide officiel du Parc National de Yellowstone : un manuel pour les touristes, une description des sources chaudes Mammoth, des bassins geyser, des cataractes, des cañons et autres caractéristiques du nouveau pays des merveilles : avec vingt et une illustrations, un plan du bassin supérieur du geyser et des cartes de route : Aussi une annexe, contenant les tarifs de chemin de fer, ainsi que d'autres informations diverses . a capté l'avis des mensqui ont visité le Parc. Elle est probablement due à une perturbation atmos-continental causée par les éruptions violentes et la théliberation de gaz qui se produit constamment dans le Parc; mais itis im

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. Official guide to the Yellowstone National Park : a manual for tourists, being a description of the Mammoth hot springs, the geyser basins, the cataracts, the cañons and other features of the new wonderland : with twenty-one illustrations, a plan of the upper geyser basin and route maps : also an appendix, containing railroad rates, as well as other miscellaneous information . caped the notice of the scientific menwho have visited the Park. It is probably due to an atmos-pheric disturbance caused by the violent eruptions and theliberation of gases constantly going on in the Park; but itis impossible to overlook the fact that it occurs only inlocalities far removed from the most violent manifestationsof energy. Yellowstone Lake Trout.—The lake is entirely desti-tute of all fish save trout. These, however, are so plentiful atalmost every point along the shores, that there is little sportafforded in capturing them. They are large, and voracious inthe extreme, particularly for grasshoppers, and two men couldcatch them faster than six men could get them ready for thecook. In a number of localities it is quite easy for the anglerto land his fish and drop it in a boiling pool behind him, without changing his position or even unhooking his victim.Whether he will eat his trout after it is cooked is somewhatquestionable. Unfortunately, most of these fish, as well as. Crater Hills, Mud Geyser, and Hot Springs, on Yellowstone Lake.96 GRAND TOUR OF THE PARK, 97 those caught in the river above the Upper Falls, are infestedwith long, slender white worms, which not only breed in theintestines, but burrow into the flesh. Col. Norris, late Super-intendent of the Park, in writing of this peculiarity, affirmsthat all the trout of the cold-water tributaries of the riverbelow the lake to the first rapids contain these parasites. Thispoint he has fully established by experiment, indicating thatthe cause of the presence of the worms exists in the lake.Beyond this no theory to account f

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