68 TIlC Al)lCricail Geologist. January, I898 
author has made it a point to devote more attention to American 
rocks, and references to the work of writers on petrology on this side 
of the Atlantic are numerous. u. s. G. 
Geological Section from Moscow to Siberia and Return. By Peksi- 
FOR Frazer. (A brochure of 52 pages read before the Academy of 
Natural Sciences of Philadelphia, Oct. 26th, 1897.) 
The paper in question is an admirable summary of the chief points 
of geologic interest seen by the author on the great excursion to the Ou- 
rals previous to the meeting of the International Congress of Geologists 
at St. Petersburg. 
Dr. Frazer, as he states, has drawn freely upon the sjilendid guide 
prepared with such great labor and expense by the Russian geologists 
but he has so interwoven his own observations with the luminous details, 
given in the guide as to make a very interesting story concerning the ge- 
ology of the region traversed. A born diplomat, Dr. Frazer has treated 
with much skill, and in the happiest manner, the extremely delicate 
question of the disputed points in the Oural mountain region. His ready 
and accurate knowledge of French has enabled him to perform a valua- 
ble service for his less fortunate brother geologists, by epitomizing in 
good English the main features of interest comprised in the Russian 
(French) guidebook. His tribute of praise for the Tzar, the Russian 
geologists, and all the Russian people, is not less happy than just. 
I. c. \v. 
MONTHLY AUTHORS' CATALOGUE 
OF American Geological Literature, 
Arranged Alphabetically* 
Bannister, H. M. 
The drift and geologic time. (Jour, of Geol., vol. 5, pp. 730-743, 
Oct.-Nov. 1897.) 
Berkey, C. P. 
Geology of the St. Croix dalles. Pt. I. (Am. Geol., vol. 20, pp. 
345-383, pis. 20-22, Dec. 1897.) 
Burwash, E. M. 
Geology of the Nipissing-Algoma line. (Ontario Bureau of Mines, 
6th [i8g6] Rept., pp. 167-184, 1897.) 
Chamberlin, T. C 
A group of hypotheses bearing on climatic changes. (Jour, of Geol., 
vol. 5, pp. 653-683, Oct.-Nov. 1897.) 
Clarke, J. M. 
A sphinctozoan calcisponge from the upper Carboniferous of eastern 
Nebraska. (Am. Geol., vol. 20, pp. 387-392, pi. 23, Nov. 1897.) 
*This list includes titles pf articles received up to the 20th of the preceding 
month, including general geology, physiography, paleontology, petrology antj 
mineralogy. 
