GEOLOGICAL SURVEY OF THE TERRITORIES. 



157 



Position. 



Above Olil Faithful 



Below Old Faithful, opposite Beo-Hivo , 



Opposite Graucl Geyser 



Above Giant 



Below Grotto 



East Fork of Fire-Hole Kiver above it3 junction with the main river, but 



below s]3rings 



Madison lUver, just below the junction of east fork of Fire-Hole Eiver 



with the Fire-Hole Eiver 



iladison Iliver about twenty miles, below the junction, of east fork of Fire- C 



Hole Eiver. i 



Madison Eiver just after its junction with the Jefferson Eiver, ngar Gallatin 



City, Montana Territory ' 



Gallatin Ei vor just above the junction with the Missouri Eiver,near Gallatin 



City, Montana Territory 



Time. 



liJ. 00 m . . . . 

 1~. 05 p. m. . 

 1~>. .30 p.m.. 



1. 50 p. m . . 



1. 55 p. m. . 



7. 30 a. m . - 



7.40 a.m.. 

 C. 00 p. m . . 

 COO a.m.., 



7.30 a.m... 



7. 30 a. m... 



a 



H 



°F. 

 56 

 58 

 5G 

 58 

 58 



44 



45 

 66 



28 



45 



45 



e 



o 

 H 



°F. 

 53 

 56 

 60 

 60 

 60 



56 



55 



60.4 



56 



53 



50.5 



These ob.servations were all made in August, with the exception of 

 the last two, which were made September 10, 1872. 



The following analyses are of specimens collected by the Snake Eiver 

 division of the expedition : 



No. 1.— Geyserite ball from geysers of Shoshone Lake. Compositiou, irregular ; luster, 

 dull; structure, amori)hous; hardness, 5.5; color, gi-aylsh \vhite. 



Analysis. 



Per cent. 



Loss at IIOOC 5.75 



Loss on ignition 6. 25 



Silica 85.75 



Alumina and iron 2. 20 



Lime 85 



Magnesia Trace. 



Soda* Trace. 



Potassa* Trace. 



Lithia* Trace. 



100. 80 



No. 2. — Bluish-gray geyserite from geysers of Shoshone Lake, 

 ated; luster, dull; hardness, 5. 



Amorphous ; lamin- 



Aiialysis. 



Per cent. 



Loss at 110° C 5.00 



Loss on ignition 8. 00 



Silica ^ 76. 80 



Alumina ^ 9.46 



Iron Trace. 



Lime i^^ L 80 



Ma ..esia Trace. 



Soda*' Trace. 



101. 06 



By spectroscopic examination. 



