1919] RURAL ENGINKF.RING. 291 



and Washington, in each case the nana] appendix of ganging stations and 

 publications relating to water resources are Included. 



Surface water supply of the United States, 1916, II, III. V (/ . 8. Oeol, 

 Survey, Water-Supply /'<//« /■. 1918, Nos. /■;.'. ;/>-. 58+XXVI, pis. i; 433, i>j>. 

 105 , \ I Ml. pis. -'.■ .',-■■'>■ i'i>- 207+2 \i\. pis. I). These papers deal win. 

 measurements of How made on streams during tin' year ended September 30, 

 1916, :is follows : Paper !•';'_', South Atlantic ami Ea 3tern Gulf of Mexico Basins ; 

 433, <>!ii<> River Basin; ami 435, Hudson Bay and Upper Mississippi River 

 Basins. Paper -I."..". was prepared in cooperation willi the States of Illinois and 

 Kentucky, ami 435 with .Minnesota, Wisconsin, Iowa, anil Illinois. in each 



case the usual appendix of gauging stations ami publications relating to water 

 resources are Included. 



Surface water supply of Hawaii, July 1, 1916, to June 30, 1917 (/ 

 Oeol. Survey, Wdter-Supply Taper \65 (1918), i>ii. t91). This report, prepared 

 in cooperation with the Territory of Hawaii, contains the results of measure- 

 ments of How of certain streams ami ditches ami records of rainfall in the 

 Territory of Hawaii made during the year ended June 30, 1917. 



Artesian waters in the vicinity of the Black Hills, S. Dak., N. II. D.\ 

 i/ . S. Ctni. Survey, Water-Supply Paper 428 (1918), pp. 64, pis. /.;. figs, in — 

 This paper describes in detail the geology of the region and discusses the un- 

 derground waters with reference to their occurrence in different geological for- 

 mations in various parts of the region. 



It is stated that tlie slopes of the Black Hills and the plains adjoining then) 

 are underlain by (5,000 ft. of sedimentary rocks, including several thick beds of 

 water-bearing sandstone which receive their water supplies from rainfall on the 

 higher ridges and slopes. The Dakota and Lakota sandstones are considered 

 to he the principal beds in which artesian water is to be expected in the plains 

 adjoining the Black Hills, the greatest volume occurring in the latter. Some 

 wells are said to show surface pressures of 175 to 200 lbs. per square inch. 



The water from these sandstones is said to be the source of supply for nu- 

 merous wells 4<H) to 2,000 ft. deep, which furnish large volumes of water in 

 eastern and central South Dakota, and it is believed that this water is also 

 available under tin- plains lying immediately east of the Black Hills. Analyses 

 of waters from various wells are included. 



Drainage methods and foundations for county roads, B. W. James, V. M. 

 PEIBCE, and <\ II. Moouki ii:u> (/ . X. Dept. Agr. Bui. 724 {1918), pp. 86, ///-v. 12, 

 figs. 1'.)). — The purpose of this bulletin is to supply information concerning the 

 proper methods of draining roadbeds, constructed of various kinds of soil, under 

 different topographic conditions, and also to explain how foundations may be 

 designed to suit the soil conditions, the road surface, and the system of drainage. 

 Considerable engineering data on the design of drains and gutters is driven, 

 hut about half the bulletin Is devoted to the design of foundations. A final 

 section on specifications is included. 



Practical hints on running a gas engine, A. P. Terkes (17. S. Dcpt. Agr., 

 Farmers 1 Bui. 1013 (1919), pp. 16). — This publication gives general suggestions 

 to inexperienced operators on how to avoid or remedy the more common forms 

 of engine trouble. A trouble chart, in which possible sources of trouble are 

 listed, is included. 



Small sawmills: Their equipment, construction, and operation. D. F. 

 Seeuey (Z7. S. Dept. Agr. Bid. 118 (1918). pp. 68).— This bulletin offers to port- 

 able-sawmill operators suggestions regarding methods of organization, milling. 

 and logging which have been proved by experience to give the best results. It 

 is meant particularly for operators in National Forest timber, but is considered 

 useful to other owners of portable mills where conditions are like those in the 



