Geology. 159 



veins of the district are found. The primary deposits are usually 

 normal fissure veins carrying gold, or sulpimrets containing gold 

 or silver,, or both native gold and snlphurets, in a gangue of 

 quartz. In 1899 the production of the district had a value of 

 something over one million dollars, and the total production up 

 to that time is estimated at a little more than eighteen millions. 

 Josiah Edward Spurr discusses The Ore Deposits of Monte 

 Cristo, Washington. The mining camp of Monte Cristo is situ- 

 ated on the western slope of the Cascade Range. The rocks of 

 this district are of various igneous types, all belonging to the 

 Tertiary age, along the joints and fractures of which the ores 

 have been deposited. The ores are most abundant near the sur- 

 face, and the ore minerals show a rough succession from the 

 surface downwards of galena, blende, chalcopyrite, pyrite and 

 arsenopyrite. The upper sulphide zone, which contains the most 

 and the richest ore, was deposited, largely at least, by descending 

 waters. w. e. f. 



Twenty-second Annual Report, 1900-01, Pt. III. Coal, 

 Oil, Cement, 742 pp., 53 pis., 69 figs. The geology, produc- 

 tion, history, etc., of the various coal fields of the United States, 

 including Alaska, are described by experts familiar with the local 

 conditions (pp. 1-571); M. L. Fuller describes the Gaines oil 

 field of Pennsylvania (pp. 529-627) ; the hydraulic cement in- 

 dustry of Michigan is discussed by Prof. Russell (pp. 635-683); 

 and J. A. Taff contributes a paper on the Chalk of southwestern 

 Arkansas (pp. 693-742). 



Water Supply and Irrigation Papers. The following num- 

 bers in this series have been issued recently : 



Nos. 58. — Storage of Water on Kings River, California ; by 

 J. B. Lippincott; 99 pp., 32 pis. 



59. — Development and application of Water near San Ber- 

 nardino, Colton and Riverside, California ; by J. B. Lippincott. 

 Part I, 95 pp., 11 pis., 14 figs. 



60.— Part II of No. 59 ; 34 pp. 



62 and 63. — Hydrography of the Southern Appalachian Moun- 

 tain Region; by Henry A. Pressey; 181 pp., 44 pis. 



64. — Accuracy of Steam Measurements; by Edward C. Murphy; 

 95 pp., 4 pis., 30 figs. 



65. — Operations at River Stations, 1901, East of Mississippi 

 River; by F. H. Newell; 224 pp. 



66. — Operations at River Stations, 1901, West of Mississippi 

 River; by F. H. Newell; 178 pp. 



67. — The Motions of Underground Water ; bv Charles S. 

 Slichter ; 101 pp., 8 pis., 50 figs. 



68. — Water Storage in the Truckee Basin, California-Nevada ; 

 by L. H. Taylor ; 87 pp., 8 pis., 20 figs. 



69.— Water Powers of the State of Maine; by Henry A. 

 Pressey; 117 pp., 14 pis., 12 figs. 



70. — Geology and Water Resources of the Patrick and Goshen 

 Hole Quadrangles, Wyoming-Nebraska ; by George I. Adams ; 

 47 pp., 11 pis., 4 figs. 



