222 Scientific Intelligence. 
420 feet at the west to 505 at Steubenville; in Pennsylvania it is 
200 feet at Ligonier, 220 at Elk Lick, and 450 to nearly 600 feet 
on the Monongahela River; in West Wivinia, along the Mononga- 
hela and Tygart’s Valley River, it varies not much from 420 feet, 
Mr, Stevenson, after stating many other facts, observes, in con 
ante that the variation in thickness arises mainly fr from the fact 
t the beds were deposited in a great trough having the Cincin- 
hati uplift on one side and the Alleghany region on the other; that 
the diminution in thickness is quite regular east and sv from the 
middle of the trough; that the subsidence as a whole was regu- 
lar, rete eH uniformity, but that there were “ balgtags or 
other irregularities such as could not fail to accompany any opera- 
tions so exten” He further concludes that “ all the coals of 
mber o 
kind ogee = Sor February, jon the Actes de? 
nou eater - Feb., 
ast Sodons nacre Corr has announced his ob- 
taining Elephas primigenius var. Columbi from Quarternar beds 
e Mas 
from correspondin ng beds near Taos, and from the valley of the 
South Platte in Northwestern Color aio: The Pliocene of Santa 
Fé affords the remains of a Mastodon, ified by Leidy to his 
obscurus, of which Cope makes a ne w species, M. productus. 
Hrrcncock, State Geologist; J. H. Huntineron, Principal Assist- 
ant. Part I, Physical Geography. 668 pp. roy. 8vo, with 
many illustrations. : dha rd, 1874,—This First Part of the Re- 
port on the Geology of New Hampshire commences with a his- 
tory of the Geological Surveys in New Hampshire by 
Pro 
Hitchcock. The chapters on this suhjent are followed by a his- 
ran of explorations among the White Mountains by W. Upham; 
chapter on the climatology of New Hampshire by J. H. Hunt 
hapten another excellent one on the use of he magnetic — 
in surveying by E. T. Quimby, illustrated by maps; others 
the topography of the State by C. H. Hitchcoe including a og 
292); 3 on che dis istetpdsion of of Plaats s by W. F. Flint; on the Natu- 
ral History of the Diatomacew by A. Mead Edwards, with a plates 
and een mere on the Scenery of the State by C. H. Hitchcock and 
J. H. Huntington. The illustrations are numerous and a number 
of them pe photographic. 
eee ee ee 
