REVIEWS 93 



gist, four zoologists, two ornithologists, two paleontologists, one 

 anatomist, one botanist — ten out of the seventeen from the biological 

 group — and four physicists. The individuals chosen and the authors 

 of the essays are as follows: 



Benjamin Thompson, Count Rumford, Physicist. By Edwin E. Slosson. 



Alexander Wilson, Ornithologist. By Witmer Stone. 



John James Audubon, Ornithologist. By Witmer Stone. 



Benjamin Silliman, Chemist. By Darnel Coit Gilman. 



Joseph Henry, Physicist. By Simon Newcomb. 



Louis Agassiz, Zoologist. By Charles Frederick Holder. 



Jeffries Wyman, Anatomist. By Burt G. Wilder. 



Asa Gray, Botanist. By John M. Coulter. 



James Dwight Dana, Geologist. By William North Rice. 



Spencer Fullerton Baird, Zoologist. By Charles Frederick Holder. 



Othniel Charles Marsh, Paleontologist. By George Bird Grinnell. 



Edward Drinker Cope, Paleontologist. By Marcus Benjamin. 



Josiah Willard Gibbs, Physicist. By Edwin E. Slosson. 



Simon Newcomb, Astronomer. By Marcus Benjamin. 



George Brown Goode, Zoologist. By' David Starr Jordan. 



Henry Augustus Rowland, Physicist. By Ira Remsen. 



William Keith Brooks, Zoologist. By E. A. Andrews. 



Students of geology will be most interested in the lives of Dana, 

 Marsh, and Cope, the leading events of whose fruitful scientific careers 

 are clearly set forth. 



R. T. C. 



Geology and Ore Deposits of Republic Mining District. By Joseph 

 B. Umpleby. Washington Geological Survey, Bulletin No. i. 

 Pp. 65; figs 5; pi. 13. Olympia, 1910. 



Physiographically the Republic mining district in northeastern 

 Washington appears to be an extension of the Interior Plateau of 

 British Columbia and to be allied in Tertiary history with it. At the 

 same time it seems to belong to a different physiographic unit from the 

 central Cascades-. 



The oldest rocks exposed in the Republic district are metamorphic, 

 and are provisionally assigned to the Carboniferous. In early or 

 middle Mesozoic times there occurred great batholithic intrusions of 

 granodioritfe. Following these came a great period of erosion lasting 

 until the middle of the Tertiary. During this time there was developed 

 an Eocene peneplain which was lifted and trenched before the end of 



