RECENT PUBLICATIONS 539 
—TYRRELL, J. BURR. Report on the country between Athabasca Lake 
and Churchill River.— Geol. Surv. of Canada, Ann. Rept., VIII, Pt. 
D, pp. 120, map. Ottawa, 1896. 
—UssinG, N. V. and Victor MADSEN, Beskrivelse til Geologisk Kort 
over Danmark (i Maalestok 1: 100,000). Kortbladet Hindsholm. Geol. 
Survey Denmark. Copenhagen, 1897. 
—VAN OrNuM, J. L. Topographical Surveys, their methods and value.— 
Bull. Univ. Wisconsin, Eng. Ser.,"I, 331-369, 1896. 
—WAHNSCHAFFE, FELIX. Ueber Aufschliisse im Diluvium bei Halbe. 
Jahr. d. K. K. Preuss. Geol. Landesanstalt, 1896, 126-135, 1897. 
—WaAkD, LESTER F. Descriptions of the species of Cycadeoidea or 
fossil Cycadean trunks thus far found in the Iron Ore Belt, Potomac 
formation of Maryland.—Proc. Biol. Soc. Washington, XI, 1-17, 
1897. 
—Watson, THoMAS L. Bibliography of the geological, mineralogical, 
Bull. Am. 
and paleontological literature of the state of Virginia. 
Pal:, 1 No: 7, pp. 109. . Ithaca, 1897. 
—WHITE, DAvip. Age of the Lower Coal of Henry County, Missouri. -— 
Bull. Am. Geol. Soc., VIII, 289-304, 1897. 
—WHITEAVES, J. F. Palzozoic Fossils, III, iii; No. 4. The fossils of 
the Galena, Trenton, and Black River formations of Lake Winnepeg 
and its vicinity.—Geol. Surv. Canada, 129-242, pl. 7. Ottawa, 1897. 
—-WHITFIELD, R. P., Descriptions of New Species of Silurian Fossils from 
Near Fort Cassin and Elsewhere on Lake Champlain. Pls. IV and 
V. Bulletin American Museum Natural History, Vol. IX, Article XI, 
pp. 177-184. 
—Descriptions of Species of Rudiste from Cretaceous Rocks of Jamaica, 
W. I. Collected and Presented by Mr. F.C. Nichols. Bulletin 
American Museum Natural History, Vol. 1X, Article XII,pp. 185—196. 
—WHITNEY, MILTON, Frank D. Gardner and Lyman J. Briggs. An 
Electrical Method of Determining the Moisture Content of Arable 
Soils. Bulletin No. 6, U. S. Dept. of Agriculture, Washington, 1897. 
WHITNEY, MILTON, and THomAS MEANS, An Electrical Method of 
Determining the Soluble Salt Contents of Soils with some Results on 
the Effect of Water and Soluble Salts on the Electrical Resistance 
of Soils. Bulletin No. 8, U. S. Dept. of Agriculture, Washington, 
1897. 
—WHITNEY, MILTON, and LYMAN J. BriaGs, An Electrical Method of 
Determining the Temperature of Soils. Bulletin No. 7, U. S. Dept. 
of Agriculture, Washington, 1897. 
