ADVKRTISEMENT. VII 



140. Report of Profjress oftlifi Division of Hydrography for the Calendar Your 1895, by Frederick 

 Haynes Newell, Hydrofiraphcr in ('linrj^c. 1X90. JS . SriO pp. Price 25 cents. 



141. The Eocene Deposits of tin- .Middle Atlantic Slope in Delaware, Maryland, and Virginia, 

 by William Bullock Clark. 1890. X. ItiT pp. 40 pi. Price 15 cents. 



142. A Brief Contribution to the (ieoloj;y and Paleontology of Northwestern Louisiana, by 

 T. Wayland Vaughan. 1X96. 8^. 05 ).p. 4 pi. Price 10 cents. 



14,3. A Bibliography of Clays and the Ceramic Arts, by John C. Brannor. 1896. 8 . HI pp. 

 Price 15 cents. 



144. The Moraines of the Missouri Coteau and their Attendant Deposits, by James Edward I'odd. 

 1896. 8'. 71pp. 21 pi. Price ](> cents. 



145. The I'otomac Formation in Virginia, by W. M. Fontaine. 1896. 8°. 149 pp. 2 pi. Price 

 15 cents. 



146. Bibliography and Index of North American Geology, Paleontology, Petrology, and Miner- 

 alogy for the Year 1895, by F. B. Weeks. 1890. 8°. 130 pp. Price 15 cents. 



147. Earth(iuakes in California in 189.5, by Charles D. Perrine, Assistant Astronomer iu Charge 

 of Earthquake Observations at the JJck Obseryatory. 1896. 8^^'. 23 pp. Price 5 cents. 



148. Analyses of Rocks, with a Chapter on Analytical Methods, Laboratory of the United States 

 Geological Survey, 1880 to 1896, by F. W. Clarke and W. F. Hillebrand. 1897. H^'. 306 pp. Price 

 20 cents. 



149. Biblioijraphy and Index of North Aniericau Geology, Paleontology, Petrology, and Miner- 

 alogy for the Ye:ir ls!li;", by Fred Itoughtou Weeks. 1X97. 8-'. 152 pp. Price 15 c'Ciits. ' 



1.50. The Educational Series of K'ock .Specimens Collected and Distriliuted by the United States 

 Geological Survey, by Josejih Silas Diller. 1898. 8^. 398 pp. 47 pi. Price 25 cents. 

 In press: 



151. The Lower Cretace<mB Gryphitas of the Texas Region, by R. T. Hill and 1'. Wayland 

 Vaughan. 1898. 8 . p]). 25 pi. Price cents. 



152. A Catalogue of the Cretaceous and Tertiary Plants of North America, by F. II. Knowlton. 

 1898. 8°. pp. Price cents. 



153. A Bibliographic Index of North American Carboniferous Invertebrates, by Stuart Welloi'. 

 1898. 8'^. pp. Price cents. 



WATER-SUPPLY AND IRRIGATION PAPERS. 



By act of Congress approved .Iiine 11, 1896, the following provision was made: 

 " I'rovided, That hereafter the reports of the Geoloical Survey in rel.-itiou to the gauging of 

 streams and to the methods of utilizing the water resources may be prin <!d in octavo form, not to 

 exceed one hundred pai^es in length aiul live thousand copies in num))er; one thousanil copiesof which 

 shall be for the oliicial use of the (ieologieal Survey, one thousand five hundred copies shall lie di-liv- 

 ered to the Senate, .aud two thousand live huudreii copies shall be delivered to the House of Repre- 

 sentatives, for distribution." 



Under this law the following papers have been issued: 



1. Pumping Water for Irrigation, by Herbert M. ^'ilson. 1896. 8". 57 ]ip. 9i)l. 



2. Irrigation near Pho'uix, Arizona, by Arthur P. Davis. 1897. 8. 97 pp. 31 pi. 



3. Sewage Irrigation, by George W. Rafter. 1897. S-. 100 pp. 4 pi. 



4. A Reconnoissance in Southeasteru Washington, by Israel Cook Russell. 1897. 8 . 96 pp. 7 pi. 



5. Irrigation Practice on the Great Plains, by Elias .iranson Cowgill. 1897. 8\ 39 pp. 12 pi. 

 0. Underground Waters of Southwestern K.insas, by Erasmus Haworth. 1897. 8'. 65 pp. 12 pi. 



7. Seepage Waters of Northern I' t.ih, by Samuel Fortier. 1897. 8-. .50 pp. 3 pi. 



8. Windmills for Irrigation, by Edward Charles Murphy. 1897. 8 •. 49 pp. 8 pi. 



9. Irrigation near Greeley, Colorado, by David Boyd. "l897. 8'-. 90 pp. 21 pi, 



10. Irrigation in Mesilla Valhy, New Mexico, by F. C. Barker. 1898, 8^. 51 pj). 11 pi. 



11. River Heights for 1896, by 'Arthur P. Davis. 1897. 8°. 100 pp. 

 In jiresit ; 



12. Water Resources of Southeastern Nebraska, by Nelson H. Darton. 1898. 8. .55 pp. 21 jn. 

 13 Irrigation Systems in Texas, by William Ferg'u.son llutson. 1898. 8. 67 pp. 10 ]il. 



14. New Tests of Certain Pumps and Water-Lifts used in Irrigation, by Ozni P. Hood. 1889. 8^. 

 pp, 1 pi. 



15. Operations at River Stations, 1897, Part I. 1898. 8'=, 100 pp. 



16. Operations at River Stations, 1897, Part II. 1898. 8°. 101-200 pp. 



TOPOGRAPHIC MAP OF THE UNITED STATES. 



When, in 1882, the Geological Survey was directed by law to make a geologic map of the United 

 States there was iu existence no suitable topogiajihie map to serve as a base for the geologic map. 

 The preparation of such a topographic map was theiel'ore immediately begun. About ouofifth of th<5 

 area of the country, excluding Alaska, has now been thus majjped. The map is published in atlas 

 sheets, each sheet representing a small (luadraugiilar ilistrict, as explained under the following head- 

 ing. The .separate sheets are sold at 5 cents each wlun fewer than 100 copies are purchased, but whiMi 

 they are ordered in lots of 100 or more copies, whether of the same sheet or of ilitl'erent sheets, the 

 price is 2 cents each. The mapped areas are widely .scattered, nearly every State being represented. 

 More th.au 800 sheets have been engraved and printed; they are tabulated by States in the Survey's 

 "List of Publications," a pamphlet which may be had on application. 



