, 
40 BIBLIOGRAPHY OF NORTH AMERICAN GEOLOGY, [bull. J 
Darton (N. H.) — Continued. 
2. Gypsum deposits in South Dakota. 
U. S. Geol. Surv., Bull. no. 223, pp. 76-78, 1 pi., 2 figs, 1904. 
Describes character, occurrence, and economic development of gypsum depos 
in the Black Hills region. 
3. Comparison of the stratigraphy of the Black Hills, Bighorn Mou 
tains, and Rocky Mountain front range. 
Geol. Soc. Am., Bull., vol. 15, pp. 379-448, 14 pis., 1904. 
Describes in detail the occurrence, character, etc., of geologic formations 
Cambrian, Ordovician, Carboniferous, Triassic, Jurassic, and Cretaceous ag 
and discusses their relations and correlations. 
Darton (N. H.) and Smith (W. S. Tangier). 
1. Edgemont folio, South Dakota-Nebraska. 
U. S. Geol. Surv., Geol. Atlas of U. S., folio no. 108, 1904. 
Describes the geography, topography, and drainage, the geologic history ar 
structure of the area, the occurrence, character, and relations of Carbo: 
iferous, Triassic, Jurassic, Cretaceous, and Tertiary sedimentary strata, ar 
the soils and water resources. 
Davidson (George). 
1. The glaciers of Alaska that arc shown on Russian charts or men 
tioned in older narratives. 
Geog. Soc. of Pac, Trans. & Proc, 2d ser., vol. 3, pp. 1-98, 11 pis. (maps), 190 
Davis (K. O. E.). 
1. Analysis of kunzite. 
Am. Jour. Sci., 4th ser., vol. 18, p. 29, 1904. 
Davis (W. M.). 
1. The relations of the earth sciences in view of their progress in th 
nineteenth century. 
Jour. Geol., vol. 12, pp. 669-687, 1904. 
2. Fresh-water Tertiaries at Green River, Wyoming. 
Abstract: < ieol. Soc. Am., Bull., vol. 14, p. 544, 1904. 
See no. 288 of U. S. Geol. Surv., Bull. no. 240. 
3. Block mountains of the Basin Range province. 
Abstract: < ieol. Soc. Am., Bull., vol. 14, p. 551, 1904. 
See no. 289 of U. S. Geol. Surv., Bull no. 240. 
Day (Arthur L.). 
1. The study of minerals in the laboratory. 
Abstract: Science, new ser., vol. 19, pp. 733-734, 1904. 
Describes experiments upon the melting-point determinations of feldspars. 
Day (David T.). 
1. Mineral resources of the United States. Calendar year 1902. 
U. S. Geol. Surv., Min. Res. of U. S. for 1902, 1038 pp., 1904. 
Contains: 
Iron ores, by John Birkinbine, p|>. 41-73. 
Statistics of the American iron trade for 1902, by James M. Swank, pp. 75-99. 
General statistics of iron and steel, iron ore, and coal, to the year 1901, inclusive, lor five 
leading iron and steel producing countries, by James M. Swank, pp. 101-122. 
