BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 183 
Tovote, W. 
2384. Das Peehblende-Vorkomnien in Gilpin County, Colorado. — Oester- 
reichische Zeitschr. f. Berg- nnd Huttenw., Jg. 54, no 18, pp. 223-224, May 5, 
1906. 
Describes the local geology and the occurrence of pitchblende in Gilpin County, 
Colorado. 
2385. Ein Ausflng durch Boulder County, Colorado. — Oesterreichische Zeit- 
schr. f. Berg- und Huttenw., Jg. 54, no. 22, pp. 281-283, 2 figs., June 2, 1906. 
Gives notes on the local geology and on the occurrence of the wolfram ores. 
2386. Gold Road, die bedeutendste Goldgrube Arizonas. — Oesterreichische 
Zeitschr. f. Berg- und Huttenw., Jg. 54, no. 42, pp. 549-550, October 20, L906. 
Describes the occurrence of gold and the mining operations at Gold Road, Arizona. 
Tower, Walter Sheldon. 
2387. Regional and economic geography of Pennsylvania. I, Physiography. — 
Philadelphia Gepg. Soc, Bull., vol. 4, no. 2, pp. 9-28, 1 pi.; no. 3, pp. 1-24 (113- 
136), 1 pi.; no. 4*, pp. 12-36 (193-217), 2 figs.; no. 5, pp. 25-35 (271-281), 1900. 
2388. Regional and economic geography of Pennsylvania. Part 2. Coal 
mining and iron and steel industry. — Philadelphia Geog. Soc, Bull., vol. 5, no. 
2, pp. 21-35, April, 1907. 
Describes the structure of the anthracite and bituminous coal fields. 
2389. Petroleum and minor mineral products in Pennsylvania. — Philadelphia, 
Geog. Soc, Bull., vol. 5, no. 3, pp 24-41, July, 1907. 
Travis, Charles. 
2390. Pyrite from Cornwall, Lebanon County, Pennsylvania. — Am. Philos. 
Soc, Proc, vol. 45, pp. 131-148, 10 figs., 1906. 
Describes crystallographic features of two varieties of Cornwall pyrite. 
True, Frederick W. 
2391. New name for Pontoleon. — Washington Biol. Soc, Proc, vol. 18, p. 253, 
1905. 
Proposes the name Pontolis in place of Pontoleon, preoccupied, given to a fossil sea 
lion from Oregon. 
2392. Description of a new genus and species of fossil seal from the Miocene 
of Maryland.— U. S. Nat. Mus., Proc, vol. 30, pp. 835-840, 2 pis., 1906. 
2393. Remarks on the type of the fossil cetacean Agarophius i>!/</ni<cii i 
/Muller).— City of Washington, Smithsonian Inst., Publ. no. 1694, 1907. 8 
PP., 1 Ph 
2394. Observations on the type specimen of the fossil cetacean Anoplonassa 
forcipata Cope. — Harvard Coll., Mus. Comp. Zool., Bull., vol. 51, no. 4, pp. 
97-106, 3 pis., 1907. 
Trumbull, L. W. 
2395. Sulphur mining and refining in Wyoming. — Mines and Minerals, vol. 
27, no. 7, pp. 314-316, 5 figs., February, 1907. 
Includes notes on the occurrence and origin of the sulphur. 
2396. Cement plaster industry in Wyoming. — Min. World, vol. 2(5, p. 3S7, 
4 figs., March 23, 1907. 
Turner, H. H. 
2397. The times and places of earthquakes. — Pop. Sci. Monthly, vol. 68, 
no. 6, pp. 537-542, June. 190(5. 
