GEOLOGICAL HISTORY OF THE YELLOWSTONE TAKK. 



147 



Ai'seiuc. 

 Constant, 

 Eohintis, 

 Fearless, 



Bead, 



Cle])sy(lra, 



C'oiiili, 



Fountain, 



Fitful, 



Excelsior, 



N'oiMMs (Jkvsku I>a>in. — IL 



{''isanre, Monaicli, 



Growler, Pearl, 



linrrieane. Pebble, 



Minute. Schliimmk«!ssel, 



IvOWKU (Jkysf.k Basix. — 17. 



(ireat I'ountaiti. Pink Cone, 



Impulsi\c, Kosette. 



Jet. S]>asni, 



Mound. Spray. 



Xarcissns. Stea<h-. 



Midway Gkvski; i'.asin. — I. 

 I'lood. Rahl)itt, Tronip. 



Ul'TKU (4KYSEK liASIX. — 4^1. 



Veteran, 

 Vixeu. 



Surprise. 

 White Dome 



A coin])arativ<' study of tlu' analyses of the fresh rliyolite, the vari- 

 ous tiaiisitiou-products, and the thermal waters points clearly to the 

 fact that the solid contents of these waters are derived for the most 

 part from the volcanic rocks of the plateau. I )uriuj;' the progress of 

 the work of the (leolo^ical Survey in the Yellowstone Park there have 

 been collected from nearly all tlic more impiu'tant localities samples of 

 the waters, which have been subjected to searching chemical analyses 

 in the laborat<uy of the Survey, by Messrs. F. A. (looch and d. K. Whit- 

 tield; the lesults of wliosc work will be published at an early date. 



The foUowini;- analyses of hot waters Irom tlu^ three princi[)al geyser 

 basins serve to show their chemical composition: 



