476 Scientific Intelligence. 



ture and stock raising. It already covers 22,000,000 acres of 

 land and is spreading at the rate of 1,000,000 acres a year. 

 Attempts to utilize the cactus for fodder, fiber, and other pur- 

 poses have been unsuccessful, and no inexpensive method for 

 ridding the land of this pest has been found. The committee 

 recommends a search for predatory fungi and insects and the 

 expenditure of $40,000 a year on investigations. h. e. g. 



5. United States Geological Survey; George Otis Smith, 

 Director. — Recent publications of the U. S. Geological Survey 

 are noted in the following list (continued from vol. 48, pp. 

 75-77) : 



Folios.— No. 209. Newell Folio, South Dakota; by N. H. 

 Darton. Pp. 7, with 3 maps and 1 sheet of illustrations. 



Professional Papers. — No. 112. Upper Cretaceous floras of 

 the Eastern Gulf Region in Tennessee, Mississippi, Alabama 

 and Georgia; by E. W. Berry. Pp. 177; 33 pis., 12 figs. 



No. 113. Iron-depositing Bacteria and their geologic rela- 

 tions; by E. C. Harder. Pp. 89; 12 pis., 14 figs. 



No. 120. Shorter contributions to general geology; David 

 White, chief geologist. Pp. 208; 37 pis., 19 figs. Contains 9 

 papers by 10 authors, previously published separately. 



No. 125-A. An Eocene flora from Trans-Pecos, Texas; by 

 E. W. Berry. Pp. 1-9 ; 3 pis., 2 figs. 



Bulletins. — No. 666-GG. Our Mineral Supplies, bibliog- 

 raphy. Pp. 58. 



No. 669. Salt resources of the United States; by W. C. 

 Phalen. Pp. 282; 17 pis., 16 figs. 



No. 678. Clays and shales of Minnesota; by F. F. Grout; 

 with contributions by E. K. Soper. Pp. 256 ; 16 pis., 38 figs. 



No. 683. The Anvik-Andreafski Region, Alaska (including 

 the Marshall District) ; by G. L. Harrington. Pp. 68 ; 7 pis. 



No. 687. The Kantishna Region, Alaska; by S. R. Capps. 

 Pp. 114; 17 pis., 6 figs. 



No. 688. The Oil Fields of Allen County, Ky., with notes 

 on the oil geology of adjoining counties; by E. W. Shaw and 

 K. F. Mather. Pp. 125 ; 10 pis., 10 figs. 



No. 690. Contributions to Economic Geology, 1918. Part I. 

 Metals and nonmetals except fuels; F. L. Ransome, E. F. Bur- 

 chard, and H. S. Gale, geologists in charge. Pp. 149; 5 pis., 

 11 figs. 



Also special parts of Nos. 691, 692, 710, 711. 



Water Supply Papers. — No. 425. Contributions to the 

 Hydrology of the United States, 1917; N. C. Grover, chief 

 hydraulic engineer. Pp. 161 ; 14 pis., 7 text figs. 



No. 429. Ground water in the San Jacinto and Temecula 

 Basins, California ; by G. A. Waring. Pp. 113 ; 14 pis., 15 figs. 



No. 446. Geology and Ground waters of the western part of 

 San Diego County, Cal. ; by A. J. Ellis and C. H. Lee. Pp. 

 321 ; 47 pis., 18 figs. 



No. 457. Surface Water Supply of the United States, 1917. 



