10 



and geysers, there being eighteen geysers of great irregularity 

 in periods of eruption ; the valley is said to have a hard white 

 silica floor, I should think it more probably calcareous. 



Dr. A. C. Peale, in report of Geological Survey of the 

 Territories, for 1872, gives description of following eight 

 principal geysers; of which I simply give the height of jets. 



Old Faithful ... height of water 130 ft. 



The Beehive... „ 178 ... height of steam 193 ft. 



The Giantess 

 The Castle ... 

 Grand Geyser 

 Furban's Geyser 

 Giant Geyser... 

 Grotto Geyser 



39 ••• » 69 

 93 ••• » "S 



173 

 25 

 ceased operations. 



40 with two openings, crossing. 



Many of the springs of the district are sulphurous, 

 giving name to the district from its colour. 



In the lower geyser basin, about ten miles down the 

 river, of twenty square miles in area, the hot springs 

 predominate ; but of the geysers, the " Architectural " is the 

 finest, the floor is of silicious deposit of various colors, with 

 " innumerable masses of cauliflower-like and beaded silica 

 standing out of the water,^' the crater is ten feet in diameter, 

 some jets sixty or eighty feet in height, others thrown laterally 

 to 30 or 40 feet ; the action is intermittent. 



There are some ten geysers at end of Thoshone lake, 

 that are called the Union, alternately throws up water and 

 steam. 



At the Crater hill, on Yellowstone river, are some 

 sulphur springs and mud geysers thrown up to a height of 

 forty feet. 



New Zealand: — In the geyser and hot spring district of 

 the North Island of New Zealand, we find almost a repetition 

 of the natural features of terraces formed by the boiling 

 springs charged with silica existing in the Yellowstone park, 

 in Colorado, the same dazzling whiteness, and brilliant pink 

 and brown colours of the deposited steps of silica — or may it 

 not be silicate of lime — also the hot sulphurous springs. 



