3i8 American Geologist. 
May, 1905 
abundant illustrations and maps, what is known of the underground wa- 
ter conditions of a large tract of country, from the south line of Kansas 
to the central part of South Dakota, i^nd from I'owa to the mountainous 
regions of Wyoming and Colorado. In making such a summary it be- 
com-?£ necessary to embrace a vist n-ass of details already known, and 
to condense them to a birdseye view, so directed as to bring out the sal- 
ient features of topography and geology but at the same time to show 
most clearly .the water resources. This object is very fully and admir- 
ably accomplished. The geology of the whole area is sketched in 189 
pages, this part embracing the greater number of the photographic plates. 
The general water conditions of the whole area are sketched and) the 
deep wells and well prospects of tlie different jtrilcs aie tlien given in 
some detail. The maps, and especially the generalized stratigraphic sec- 
tions, are well conceived and well executed. The report will be in great 
demand throughout the whole countiy n. ii. w. 
MONTHLY AUTHOR^S CATALOGUE 
OF AMERICAN GEOLOGICAL LITERATURE 
ARRANGED ALPHABETICALLY. 
ADAMS, E. P. 
Absence of Helium from Carnotite. (Am. Jour, Sci., April, 1905, 
p. 321). 
ANDERSON, R. H. (see HOYT, J. C.) 
BAILEY, W. S. 
Marine Topography and Geology. (U. S. G. S., "Wat. Sup. Ir. 
Pap., 114 pp. 41-48, 1905.) 
BRANNER, J. C. 
Stone Reefs on the Northeast Coast of Brazil. (Bull. Geo!. Soc, 
Vol. 16, pp. 1-12, Pis. 1-11.) 
CASE, E. C. 
The Osteology of the Diadectidae and their Relations to the Chel- 
ydosauria. (Jour. Geol., Feb. -Mar., 1905, p. 126.) 
CLAPP, FREDERICK G. 
Limestones of Southwestern Pennsylvania. (U. S. G. S. Bull., No, 
9, pp. 48, PI. 7.) 
CROSBY, W. O. 
Massachusetts and Rhode Island, Geology and Water Supply. (U. 
S. G. S., Wat. Sup. Ir. Pap., No. 114, pp. 68-75, 1905.) 
DALY, R. A. 
The Accordance of Summit Levels among Alpine Mountains 
(Jour. Geol., Feb.-Mar., 1905, p. 105.) 
