KURAL ENGINEEEING. 189 



"(10) Tbo aiiiouiit of dissolved salts ^'rows loss with tlie dopth and with 

 distance from the river channel. 



"(11) There is no appreciable run-off in vicinity of (iarden, Kans. 



"(12) Carefully constructed wells in Arkansas Valley are capable of yield- 

 ing very large amounts of water. Each square foot of percolating surface of 

 well strainers can be relied uiioii to yield more than 0.25 gal. of water per 

 minute under 1-ft. head. 



"(14) Private pumping plants in the bottom lands will be profitable for irri- 

 gation if pro]ier kind of power be used. . . . The present cost of puniiting with 

 gasoline for fuel is not encouraging." 



The measurements of movement of underflow were made l>y the electrical 

 method. (Jround-water levels were obtained by observing water levels in pri- 

 vate and si)ecially sunk wells. Various contour maps of the water plane, 

 cross-sections at various points, and views of cardboard models of changes in 

 water plane at different localities illnsti'ate the report. 



Underground water in the valleys of Utah Lake and Jordan River, Utah, 

 G. B. Richardson {l\ »S'. Gcol. Survey, Water-supply anO Irrig. Paper No. 

 J.57, pp. 81, pis. 9, fiys. 5). — This paper "outlines conditions of occurrence of 

 the subterranean waters and describes their development in the valleys of Utah 

 Lake and .Jordan River." 



Water powers of northern Wisconsin, L. S. Smith ([/. S. Geol. Survey, 

 Water-supply and Jrriy. Paper Ao. lo6, pp. l.'t'), pis. o, flgs. 5). — A study of the 

 water powers of the various drainage systems of northern Wisconsin, including 

 for each system information as to its topography and drainage, reservoir sites, 

 and the water powers develoi)ed along the different streams. 



High-lift turbine pumps; their design and efficiency, R. J. Durley {Enyhi. 

 Mag.. .31 (lOOG). Xa. '/. pp. 503-52-j. figs. ;?.'/). — A review of the work which has 

 been done in the last few years in the application of the centrifugal pump to 

 those high-lift operations where formerly only the reciprocating pump was 

 practicable. 



These high-lift centrifugal pumps differ from the usual centrifugal pumps 

 merely in having a ring of guide blades sui'rounding the impeller. By placing 

 turbine pumps in series so that the first impeller discharges into a space con- 

 nected with the suction of the second wheel, and so on, a multiple-stage pump 

 is obtained, making it possil)le to pump against corresi)ondingly greater heads. 

 The usual head for a multiple-stage pump is from .'JdO to (ioO ft., though l)y put- 

 ting two or more such jiumps in series heads up to l,r)0() ft. have ijeen attained. 



"The results attained by the modern high-lift centrifugal pump may be 

 stated generally as follows: An efficiency in most cases of 70 to 75 per cent can 

 be obtained, and under suitable conditions, when the relation between head and 

 discharge is most favorable, this may even reach 80 per cent on trial. 



" It is probal)le that further progress will soon enable efliciencies correspond- 

 ing to those of the best water turl)ines to be obtained. 



" It is worthy of remark that high-lift turbine pumps can maintain their 

 original efficiency much better than is usual with large piston pumps." 



A numl)er of examples are cited of successful a]iplication of the turl)ine pump 

 to various jairposes. and the article is llkistrated by numerous diagrams and 

 half-tones of different tyiies of pumps. 



Suction gas producer trials {Engineer \Eonrfon\. 101 {lHOd). A o. 2(;.S'>. pp. 

 ii')!). (!(10. fi(/s. III). — The 20-hoi-sepower jilant of the National Gas Comi)any. Ltd., 

 Ashton-under-Lyne, secured the gold medal in the tests conducted under the 

 auspices of the Royal Agricultural Society at Derby. 

 8989— No. 2—06 7 



