194 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Watson, Thomas Leonard — Continued. 
2487. The copper deposits of Virginia. — Eng. and Min. Jour., vol. 82, pp. 
824-825, 2 figs., November 3, 1906. 
Describes the occurrence of copper ores in various parts of the State. 
The Virginia copper deposits. — See Weed and Watson, no. 2504. 
2488. Fluorite and barite in Tennessee. — Am. Inst. Min. Eng., Bi-Mo. Bull., 
no. 13, p. 77, January, 1907 ; Trans., vol. 37, p. S90, 1907. 
A brief note in regard to the occurrence of fluorite and barite in Tennessee. 
2489. On a dike of diabase in the Potsdam sandstone in the Valley of Vir- 
ginia. — Am. Jour. Sci., 4th ser., vol. 23, pp. 89-90, February, 1907. 
Refers briefly to recorded occurrences of dikes penetrating Paleozoic rocks of Virginia 
and describes the occurrence and character of an igneous rock in Cambrian sandstone in 
Augusta County, Virginia. 
2490. The occurrence of nickel in Virginia. — Am. Inst. Min. Eng., Bi-Mo. 
Bull., no. 17, pp. 829-843, 8 figs., September, 1907. 
2491. Geology of the Virginia barite deposits.— Am. Inst. Min. Eng., Bi-Mo. 
Bull., no. 18, pp. 953-976, 9 figs., November, 1907. 
2492. Occurrence of rutile in Virginia. — Econ. Geology, vol. 2, no. 5, pp. 
493-504, 5 figs., 1907. 
Describes the local geology and the occurrence and character of rutile deposits near 
Roseland, Nelson County, Virginia. 
2493. Mineral resources of Virginia. — The Virginia Jamestown Exposition 
Commission, Lynchburg, 1907. 618 pp., 83 pis. (incl. maps), 101 figs. 
The section on cement and cement materials is by R. S. Bassler (pp. 86-167), on 
clays by Heinrich Ries (pp. 167-187), and on iron by R. J. Holden (pp. 402-491). 
Watson, Thomas Leonard, and Laney, Francis B., with the collaboration of 
George P. Merrill. 
2494. The building and ornamental stones of North Carolina. — North Carolina 
Geol. Survey, Bull. no. 2, 283 pp., 32 pis., 11 figs., 1906. 
Describes the varieties, distribution, geologic relations, character, microscopic struc- 
ture, and weathering qualities of the building stones. 
Weatherbe, D'Arcy. 
2495. Boring machines. — Nova Scotia, Dept. of Mines, Rept. for 1904, pp. 
82-93, 1905. 
Contains records of strata passed through in borings in Nova Scotia. 
Webster, Clement L. 
2496. Description of a new genus [Westema] of gastropod from the Hack- 
berry group of Iowa. — Iowa Naturalist, vol. 1, no. 3, pp. 54-55, July, 1905. 
2497. Description of new species of gastropods from the lower and middle 
beds of the Hackberry group of Iowa. — Iowa Naturalist, vol. 2, no. 1, pp. 2-4* 
January, 1906. 
Weed, Walter Harvey. 
2498. Shifting of the continental divide at Butte, Montana. — Abstract : Geo! 
.Soc. America, Bull., vol. 16, p. 587, 1906. 
2499. The copper mines of the United States in 1905.— U. S. Geol. Survey, 
Bull. no. 285, pp. 93-124, 2 figs., 1906. 
Describes the general condition of the copper industry in the United States, and the 
geology, character, occurrence, and other features of the copper ores of the several States. 
2500. Ore shoots. — Eng. and Min. Jour., vol. 82, p. 196, 3 figs., August 4, 
1906. 
Discusses the localization of pay ore in ore shoots, 
