56 The American GcoUn^ist. .uiiy. 1901. 
ri\t-:r i'K()fili-:s. 
An interesting and valnal)le publieation of the Department 
of Hydrography of the L'nitcd States Geological Survev on the 
Profiles of Rivers in the L'nited States by Henry (lannett, has 
jnst been pnblished and is now availal)le for distribution. It em- 
bodies within 100 pages the leading facts of about 150 of the 
most important rivers and streams of the country, noting their 
length, drainage area, the location of water power in their 
courses, their peculiarities of flow and the nature of their 
drainage basins. 
The rivers selected are those which are the largest in size 
and bear most directly upon the varied interests of the country 
such as the Connecticut, Hudson, Susquehanna, Ohio, Po- 
tomac, Mississippi, Missouri, Platte, Colorado, Sacramento, 
Columbia, and others. The figures for the tables showin^.f 
hight above sea level and fall per mile were collected from 
various sources. Some were obtained from the report of the 
Chief Engineer of the United States Army, some from railroad 
companies when their lines cross the streams and some from 
the atlas sheets of the United States Geological Survey. 
In the case of such rivers as the Connecticut. Susquehanna, 
Mississippi and Colorado, where the surrounding country is, in 
part or whole, of peculiar physiographic interest, very excel- 
lent and vivid descriptions of its leading- physical characteris- 
tics are given which add to the interest and render it valuable 
from an educational standpoint in geographic and physio- 
graphic instruction. 
The pamphlet is the result of much careful work and is the 
first attempt to collect and compile this information in its pres- 
ent form. 
GUIDE TO THE GEOLOGY OF NIAGARA FALLS. 
We referred in the last number of the Geologist to ]\Ir. G. 
K. Gilbert's resume of the Falls of Niagara, and to the 
map of the region lately issued l)y the United States 
Geological Sui-vey. More recently a more complete 
"guide to the geology and paleontology of Niagara Falls 
and vicinity" has been published by the New York 
State Museum, as F>ulletin No. 54, vol. ix, April, 1901. 
It is by Dr. A. W. Grabau, of the Rensselaer Polytech- 
nic Institute, at Trov, N. Y. It also contains a glossary of pale- 
