768 THE AMERICAN NATURALIST.  [Vor. XXXIX. 
The work accomplished by the United States Geological Survey 
for the year 1903-1904 is summarized in the 7wenty-fifth Annual 
Report of the Director of the United States Geological Survey to the 
Secretary of the Interior, published in Washington, 1904. The vol- 
ume consists of 388 pages, 25 plates, and 2 figures. 
A novel way in which vegetation may leave evidence of its exist- 
ence is described by C. H. White, with illustrations, in-the American 
Journal of Science (vol. 19, March, 1905, pp. 231-236). This process 
consists in the abstraction of coloring matter of the rock on which 
the plant grows, or the precipitation of coloring matter by the plant. 
The result of either process is to produce a picture of the plant 
by the plant itself. For such a picture White proposes the term 
" autophytograph," and for the process * autophytography." 
Professional Paper 31, of the United States Geological Survey, is a 
" Preliminary Report on the Geology of the Arbuckle and Wichita 
Mountains in Indian Territory and Oklahoma” by J. A. Taft, with 
“An Appendix on Reported Ore Deposits of the Wichita Mountains ” 
by H. F. Bain. This report, of 97 pages, is well illustrated by 8 
plates and 1 figure. 
“The Preliminary Report of the Ohio Cooperative Topographical 
Survey, Nov. 15, 1903,” published in Springfield, Ohio, in 1904, 
gives in its 227 pages a description of the methods employed, and 
carefully tabulated elevations and positions for the points located by 
the Survey. 
“The Uses of Hydraulic Cement,” by F. H. Eno, appears as 
Bulletin 2, Fourth Series, Geological Survey of Ohio. The account 
is quite popular in style, and the subject matter is of more interest 
to the constructing engineer than to the geologist. The report treats 
of hydraulic cements in general, rather than those of Ohio in partic- 
ular. The following chapter headings suggest the scope of the 
work: A Brief History of Cement, Uses of Cement in Mortars, Uses 
of Cement in Concrete, Uses of Cement in Reénforced Concrete, 
Specification for Concrete Materials, Materials and Tools. : 
W. M. Davis, in an article on 
Suess’ Theories ” 
adversely criticise 
“ The Bearing of Physiography upon 
(Amer. Jour. Sci., 4th series, vol. 19, pp. 265-273) 
S the idea that certain plateau-like masses, such as 
the Schiefergebirge, owe their altitude, not to their own uplift, but to 
the subsidence of the surrounding lower areas. 
