202 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, 1906-1907. 
Willcox, Oswin W. 
2580. The viscous vs. the granular theory of glacial motion. Long Branch, 
N. J. Published by the author, 1906. 23 pp. 
2581. The iron concretions of the Redbank sands. — Jour. Geology, vol. 11, 
no. 3, pp. 243-252, 8 figs., 1908. 
Describes the occurrence and character of these concretions and discusses the mode of 
their formation. 
Williams, H. J. Carnegie. 
2582. The Bruce Mines, Ontario, 1846-1906.— Canadian Min. Jour., vol. 28. 
no. 4 (new ser., vol. 1, no. 2), pp. 47-51, 4 figs., April 1, 1907. 
Includes notes on the local geology and the occurrence of the copper ores. 
Williams, Henry Shaler. 
2583. The Devonian section of Ithaca, N. Y. — Jour. Geology, vol. 14, no. 7, 
pp. 579-598, 1906. 
Discusses rules of correlation and nomenclature and their application to this section. 
2584. Revision of the geological section passing through Ithaca, N. Y. — 
Abstract : Science, new ser., vol. 24, pp. 365-367, September 21, 1906. 
2585. A new brachiopod, Rensselaeria mainensis, from the Devonian of 
Maine.— U. S. Nat. Mus., Proc, vol. 32, pp. 267-269, 2 figs., 1907. 
2586. The Devonian section of Ithaca, N. Y. Part II. The discrimination of 
the Xunda-Chemung boundary. — Jour. Geology, vol. 15, no. 2, pp. 93-112, 1907. 
2587. Revision of the geological section passing through Ithaca, N. Y. — 
Abstract : Am. Assoc. Adv. ScL, Proc, vol. 56-57, pp. 265-267, 1907. 
Williams, Ira A. 
2588. Geology of Franklin County [Iowa]. — Iowa Geol. Survey, vol. 16, pp. 
453-507, geol. maps, 10 figs., 1906. 
Describes the topography and drainage, the stratigraphy, including Devonian and Car- 
boniferous stratified rocks and glacial deposits, and the economic products. 
The materials and manufacture of Portland cement. — See Beyer and Williams, 
no. 233. 
The geology of Iowa quarry products. — See Beyer and Williams, no. 234. 
Willimott, C. W. 
2589. The mineral pigments of Canada. — Canada Geol. Survey, 39 pp., 1900. 
Includes notes on the occurrence in Canada of various minerals which may be used for 
pigments. 
Willis, Bailey. 
2590. Geologic research in continental histories. — Carnegie Inst, of Wash- 
ington, Yearb. no. 4, 1905, pp. 204-214, 1906. 
2591. Carte geologique de PAmerique du Nord. 1906. Scale 1 : 5,000,000. Pre- 
pared for the Congres geologique international, X e session, Mexico, 1906. 
2592. Geographic history of Potomac River. — U. S. Geol. Survey, W.-S. and 
Irr. Paper no. 192, pp. 7-22, 1 pi., 1907. 
2593. How should faults be named and classified? — Econ. Geology, vol. 2, 
no. 3, pp. 295-298, 1907. 
2594. Carte geologique de PAmerique du Nord. — Congr. geol. intern., C. R. 
10 e sess., Mexico, 1906, pp. 211-225, 1907. 
Describes the construction, nomenclature, classification, and coloring of the geological 
map of North America prepared for the International Geological Congress, held in Mexico, 
1906. 
2595. The Appalachian revolution. — Abstract : Science, new ser., vol. 25, 
p. 867. May 31. 1907. 
