Geology and Natural History. 439 
auriferous, in the same manner and under the same circumstances 
as the Cretaceous of Sto. Domingo, Wherever dykes cut up the 
metamorphic shale and sandstones, auriferous quartz veins occur 3 
and placer deposits exist in most of the streams that run from the 
margins of the voleanic belt. 
3, More human skeletons from the Caves of Mentone.—M. 
RiviirE read a paper, on the 23rd of February, before the Acad- 
emy of Sciences of Paris, on three new skeletons from the caves of 
Mentone. In it he states that the chipped flints disappear below 
and become replaced by implements of sandstone and limestone. 
4, Mines and Mining in the States and Territories West of the 
r. Amos Bowman’s chapter on “ The 
Pliocene Rivers of California” presents the results of an extended 
while Mr, Char r presents a paper on “Hydraulic 
Mining in California,” illustrated by the remarkable experiences 
at the famous Spri y Company’s works at Cherokee, Butte 
8 on ore-dressing and mining-machinery, with miscellaneous 
statistics, conclude the volume. “The General Geological Map of 
the United States,” by Messrs. Hitchcock and Blake, which accom- 
panies this Report, we have already noticed in this Journal. _ s. 
5. Mineralogy and Chemistry: Original Researches ; by Pro 
J. Lawrence Situ, of Louisville, Ky. 401 pp. 8vo. Louisville, 
1873. (John P. Morton & Co.)—In this well printed volume, 
- Smith has thrown together cgi | of his original contri- 
i che 
i i inati American 
is memoir on Emery (1850); re-examination of 1 
Minerals (1853); Thermal waters of Asia Minor (1849), and his 
Am. Jour, So1.—Tuirp = Vou. VU, No. 40.—ApRIL, 1874, 
1 
