RECENT PUBLICATIONS 772 
—WaulL, WatTer. Beitraége zur Geologie der prikambrischen Bildungen in 
Gouvernement Olonez, II, 3, Die Gesteine der Westkiiste der Onga-Sees. 
[Fennia 24, No. 3. Helsingfors, 1908.] 
—WALcoTT, CHARLES D. Cambrian Geology and Paleontology. No. 3. 
Cambrian Brachiopoda: Descriptions of New Genera and Species. [Smith- 
sonian Miscellaneous Collections. Part of Vol. LIII. No. 1810. Wash- 
ington, October 1, 1908.] 
Cambrian Geology and Paleontology. No. 4. Classification and 
Terminology of the Cambrian Brachiopoda. [Smithsonian Miscellaneous 
Collections. Part of Vol. LITT. No. 1811. Washington, October 13, 1908.] 
—Washington Academy of Sciences, Proceedings of the. Vol. X. Contents, 
Notices of Deceased Members, and Index. [Washington, 1908.] 
—WIELAND, G. R. Historic Fossil Cycads. [From the Americal Journal of 
Science, Vol. XXV, February, 1908.] 
—WaultE, I. C., Chief of the Brazilian Coal Commission. Final Report of, 
from July 1, 1904, to May 31, 1906. PartI. Geology, by Dr. I. C. White. 
Part IJ. Mesosaurus brasiliensis, by Dr. J. H. McGregor. Part III. 
Fossil Plants, by Dr. David White. [Commissao de Estudos das Minas de 
Carvaa de Pedro do Brazil. Rio de Janeiro, Imprensa Nacional, 1908.] 
The Barren Zone of the Northern Appalachian Coal Field and Its 
Relations to Pittsburg’s Industries. [Address before the American Mining 
Congress, Pittsburg, Pennsylvania, December 5, 1908.] 
—WILCKENS, Otto. Radiolarit im Culm der Attendorn-Elsper Doppelmulde 
(Rheinisches Schiefergebirge). [Sonder-Abdruck aus den Monatsberichten 
der deutschen geologischen Gesellschaft, Band 60, Jahrgang 1908, No. 12.) 
Das kristalline Grundgebirge des Schwarzwaldes. [Sonder-Abdruck 
aus der Steinbruch. Berlin.] 
—Wituston, S. W. Lysorophus, a Permian Urodele. [Reprinted from 
Biological Bulletin, Vol. XV, No. 5, October, 1908.] 
—Witson, D. W. anp Martues, F. E. The Relation of Geology to Topog- 
raphy. [Reprinted from Principles and Practice of Surveying, Vol. IT, 
by Charles B. Breed and George L. Hosmer. New York, 1908.] 
—WINCHELL, N. H. Ano A. N. Elements of Optical Mineralogy, an Intro- 
duction to Microscopic Petrography. [New York: D. Van Nostrand Co., 
1909. | 
—WoopmaN, J. Epmunp. Probable Age of the Meguma (Gold-bearing) Series 
of Nova Scotia. [Bulletin of the Geological Society of America, Vol. XIX, 
pp. 99-112, Plates 6-8. New York, July, 1908.] 
—WnrRIGHT, FRED. EUGENE. On the Measurement of Extinction Angles in the 
Thin Section. The Bi-Quartz Wedge Plate Applied to Polarimeters and 
Saccharimeters. [From the American Journal of Science, Vol. XXVI, 
October, 1908.] 
Artificial Daylight for Use with the Microscope. [The American 
Journal of Science, Vol. XXVI, December, 1908.] 
