Geology and Mineralogy. 315 
and Westmoreland oo west from Chestnut Ridge. 438 pp. 
8vo, with maps and se —Professor Stevenson’s Report gives 
first an account of he "phytical features and general geology of 
the district, and then describes with detail the stratification of the 
bed. The coals and iron ores are described, and many analyses 
are ie = spe latter. 
(2.) Report of Pr ogress in the Cambria and Somerset District 
sale the Fituntaoud Coal Fields of Western Pennsylvania ; by . 
ews :G, Pra Part II, Somerset. 
vate , Pa.—The region he scribed lies to the southeast of 
1858 to occur i the bottom “of the Barren oe and at the top 
of the Lower Productive Coal series, has no > and opt it 
should fer fpr from that report wherever it occurs, an 
from Lesley’s “ Manual of Coal.” The Report is ‘lustrated by 
numerous wood-cuts, and six maps and sections. 
(3.) wy Well trot dens and Levels ; by Joun F. a 348 
Pp. 8vo. Harrisburg, Pa.—This Report is a very Vv. e sys- 
temnatiied statement of facts connected with the oil Broan of 
Western Pennsylvania. It contains the geological and geograph- 
ical positions and depths of all the oil openings, and sections of 
the rocks in each case as far as oe By were obtainable. _ The work 
