21 



191. The Gold and Silver Veins of Silver City, De Lamar and other 



Mining Districts in Idaho. 20th annual report, U. S. G. S., part 3, 

 pp. 78, 79, 1900. 



A map of west central Idaho and Oregon, showing ages of rocks 

 and a description of fossil collection from near state line. 



192. Rare Minerals in Gold Quartz Veins of Eastern Oregon. Mining 



and Scientific Press, Vol, 82, p. 252. 1901. 



Gives a chemical analysis of roscoelite and notes on other min- 

 erals. 



193. Trias in Northeastern Oregon. Science, N. S., Vol. 13, pp. 27Q-1, 



1901. 



A short summary of Lindgren's paper as read before the Geol. 

 Societ}^ of Washington. 



194. • • The Geological Features of the Gold Production of North America. 



Trans. Am. I. M. E. Vol. 33, pp. 833-4, 1903. 



Statistics of productions of Oregon since discovery, geological 

 features, distribution and future tendency. 



195. — Gvpsum Deposits in Oregon. U. S. G. S. Bull. No. 223, p. Ill, 



1904. ^ 



Describes character, occurrence, economic development and geo- 

 logic relations of gypsum deposits in Eastern Oregon. 



196. Lindgren, Waldemar, and Drake, N. T. Nampa Folio, Idaho-Oregon. 



U. S. G. S., Geol. Atlas of the U. S. No. 103, 1904. 



Describes the geography, the geologic history, the occurrence and 

 character of the tertiary strata and igneous rocks and quaternary 

 deposits and the economic resources, chiefly placer gold. 



197. Logan, W. N, A North American Epicontinental Sea of Jurassic Age, 



Jour. Geol., Vol. 8, 1900. (p. 271, map showing Chico and Horsetown 

 shore line from Lower California to Puget Sound; explanation pp. 



. 269-70.) 



198. Louderback, George Davis, The Mesozoic of Southwestern Oregon. 



Jour. Geol., Vol. 13, No. 6, pp. 514-55, Sept.-Oct., 1905. 



Defines horizons of quadrangles of Diller, between Cascade moun- 

 tains and Pacific Ocean. 



199. Study of the Basin Range Structure and Glaucophane and Asso- 

 ciated Schists of California and Oregon. Carnegie Inst, of Wash., 

 Year No. 4, 1905, p. 191, 1906, 



200. MacDonald, Donald Francis, Notes on the Bohemia Mining District, 



Oregon. Bull. 380, U. S. G. S., pp. 80-5, 1909. 



201. MacFarlane, J, Geographical Railway Guide, p. 316. 



202. Mackie, W, W,, and Jensen, Charles A, See Jensen, Charles, and 



Mackie, W. W. 



203. Mallory Willard. Native Gold in Igneous Rocks. Eng. & Mg. Jour., 



Vol. 77, p. 596, 1904. 



Describes the occurrence of native gold in Oregon. 



203a. Mann, C, W,, and Ferguson, J, E, Soil Survey of the Marshfield 

 Area, Oregon. Field operations. Bureau of Soils. U, S. Dept. Agr., 

 1909, pp. 1601-33. 



203b. Marshall, R. B. Results of Spirit Leveling in Oregon, 1896 to 1910, inc., 

 U. S. G. S. Bull. 462, 1911, pp. 82. 



List of levels at many points in the state, with index. 



