448 Bibliography. 
ment of a Journal is to promote the same important object, besides 
contributing to the increase and diffusion of knowledge in this depart- 
ment, and exciting a spirit of inquiry and emulation in the profession. 
This Journal is issaed monthly in numbers o pages. It is stated, 
however, that it is no intention of the College to derive an income from 
- the Journal; and that as soon as the state of the subscription list war- 
rants it, it is intended to increase its size so that each number shall con- 
tain 48 instead of 32 pages. Terms three dollars per annum. 
4. Contributions to the Natural History of the Fresh Water Fishes 
of North America; by Cuantes Girarp. I. A Monograph of the 
Cottoids. 80 pp. 4to, with 3 plates in lithography. Smithsonian Con- 
tributions to Knowledge, vol. iii, Art. 3. list of the genera and spe 
cies proposed as new in this memoir is given in our Appendix to 
this volume. The or first enters into a historical account of 
our knowledge of the Cottoids and of the synonymy of the species; 
and then mentions the geological history of the family, under the rather 
singular title of “‘the Genealogy of the Cottoids.” e also briefly 
treats of the geographical distribution and habits of the species. The 
descriptions of the Cottoids of America are drawn out with fullness, 
and they are well illustrated in the plates. The last plate contains 
figures of details of structure. 
5. Elements of Electro-Metallurgy ; by AurreD Suez, F.R.S., Ist 
‘Amer. from 3d London edit. Revised, corrected and considerably en- 
larged, 364 pp. 12mo, illustrated with stereotypes and numerous wood- 
é : 
the fifth; galvanic etching, the sixth; electro-disruptive etching, the 
seventh ; voltaic blasting, the eighth, 
6. Grundziige der Geognosie und Geologie fur Schule und Haus, 
nach D. T. Ansted, a, Dufr +» Hausmann, Naumann, u. A. mM. 
frei bearbeitet; von Dr. Gustav Leonnarp. 172 pp., 12mo, Stutt- 
gart, 1852.—The author of this geological text-book, well known by 
is labors in geology and mineralogy, commences his work with a 
chapter giving the names and mineral constitution of the rocks. Gene- 
ral explanations follow with reference to the mode of occurrence of 
rocks and their subdivisions, and also a chapter on the grand divisions 
of the animal and vegetable kingdom, with reference to the subject of 
fossils. The several rock formations are then treated of in a series of 
chapters, and wood-cuts of characteristic’ fossils are added. in the text. 
Plutonic and volcanic rocks, and the action of volcanoes occupy another 
