852 REVIEWS AND BOOK NOTICES. 
nature, and who expose them in certain brilliant mathematic laws, 
enhanced by the attraction of difficulties overcome, and of secrets 
unveiled. Vain efforts! They are only deceiving mirages. Ten, 
twenty, thirty years of observation dissipate them, and demon- 
strate their insufficiency and falsity. It is observation alone. 
Observe! Always observe! Do not leave a single corner of the 
globe without the minute observations of travelling and of resi- 
dent geologists ; and then we can generalize, and the mysteries of 
our planet will be unveiled and systematized in a synthesis, solid, 
logical with facts, well balanced and truly philosophical. 
REVIEWS AND BOOK NOTICES. 
GEoLoGY or Montana. *—Full of interest as this volume is to 
naturalists and geologists, it also forms the most authentic account 
we have of the youngest of our territories; and as such, with its 
fully illustrated accounts of the hot springs and geysers of thé 
YeHowstone and its tributaries, the graphic description of the 
wonders of the Yellowstone lake and falls, and of the Yellowstone 
National Park, together with the results of Messrs. Lesquereux 
and Cope’s paleontological discoveries, will make the work excel- 
lent reading for any one not specially versed in science. 
The White Mountain hot springs on Gardiner’s River, will first 
engage our attention. They are not so numerous nor so wonde i 
as those of the Yellowstone valley or Fire Hole basin, but are 
much more accessible, and were, at the time the party survey ed 
them, frequented by a number of invalids, especially those suffer- 
ing from cutaneous diseases. We quote Prof. Hayden’s account. 
“We pitched our camp at the foot of the principal mountain, by 
the side of the stream that contained the aggregated waters of the 
hot springs above, which, by the time they had reached Me camp, 
words. The eye alone could convey any adequate conception to 
the mind. The steep sides of the hill were ornamented with & 
wee a ae 
*Prelimmary Report of United States Survey of Montana and Portions of sce 
_ ‘Territories; being a Fifth Annual Report of ss, By F. V. Hayden, U. S. Geole 
gist, Washington, 1872, 8vo. pp. 538. With Maps and Illustrations. 
