82 Scientific Intelligence. 



No. 41. — Geology of the Central Copper River Region, Alaska; 

 by Walter C. Mendenhall. Pp. 133, with 20 plates and 11 

 figures. See below. 



No. 42. — Geology of the Tonapah Mining District, Nevada ; 

 by Josiah Edward Spurr. Pp. 295, with 24 plates and 78 fig- 

 ures. See below. 



Bulletins — No. 268. — Miocene Foraminifera from the Mon- 

 terey Shale of California, with a few Species from the Tejon 

 Formation; by Rufus M. Bagg, Jr. Pp. 78, with 11 plates and 2 

 figures. 



No. 270. — The Configuration of the Rock Floor of Greater 

 New York ; by Will r am Herbert Hobbs. Pp. 96, with 5 plates 

 and 6 figures. 



Water Supply and Irrigation Papers. — No. 123. — Geology 

 and Underground Water Conditions of the Jornada del Muerto, 

 New Mexico ; by Charles Rollin Ketes. Pp. 42, with 7 plates 

 and 11 figures. 



No. 137. — Development of Underground Waters in the East- 

 ern Coastal Plain Region of Southern California ; by Walter C. 

 Mendenhall. Pp. 140, with 7 plates and 6 figures. 



No. 138. — Development of Underground Waters in the Central 

 Coastal Plain Region of Southern California ; by Walter C. 

 Mendenhall. Pp. 162, with 4 plates and 5 figures. 



No. 139. — Development of Underground Waters in the West- 

 ern Coastal Plain Region of Southern California ; by Walter C. 

 Mendenhall. Pp. 103, with 8 plates and 1 figure. 



No. 140. — Field Measurements of the Rate of Movement of 

 Underground Waters; by Charles S. Slichter. Pp. 122, with 



15 plates and 67 figures. 



No. 141. — Observations on the Ground Waters of Rio Grande 

 Valley ; by Charles S. Slighter. Pp. 83, with 5 plates and 32 

 figures. 



No. 142. — The Hydrology of San Bernardino Valley, Califor- 

 nia ; by Walter C. Mendenhall. Pp. 124, with 12 plates and 



16 figures. 



No. 145. —Contributions to the Hydrology of Eastern United 

 States, 1905. Myron L. Fuller, Geologist in charge. Pp. 220, 

 with 6 plates and 42 figures. 



No. 151. — Field Assay of Water; by Marshall O. Leighton. 

 Pp. 76, with 4 plates and 3 figures. 



No. 152. — A Review of the Law T s forbidding Pollution of 

 Inland Waters in the United States; second edition ; by Edwin 

 B. Goodell. Pp. 149. 



2. Geology of the Central Copper River Region, Alaska ; by 

 Walter C. Mendenhall. U. S. G. S. Professional Paper No. 

 41, 127 pp., 20 pis., 11 figures in text. — This paper gives a gen- 

 eral description of the geology of a district which lies near the 

 southeast corner of the main mass of Alaska. An account of the 

 economic geology of the area is included which has been in great 

 part reprinted from an earlier paper entitled, "The Mineral 



