1919] KURAL ENGINEERING. 583 



Latitude, longitude, and sea level elevation of bench marks in Texas, 

 A. A. Stiles (Tex. State Reclam. Dcpt. Bui. 7 (1917), pp. V I +2SJi).— This luvnd- 

 book gives the location and elevation of bench marks established in Texas by 

 the State Reclamation Department. 



Report of hydrometric surveys (stream measurements) for the calendar 

 year 1916, P. M. Sauder, V. A. Newhall, and W. H. Storey (Dept. Int. Can- 

 ada, Irrig. Branch, Rpt. Hydrom. Surveys, 1916, pp. 609, pis. 5, figs. S).-r-This 

 report 2)resents tlie results of measurements of flow made on streams, irriga- 

 tion ditches, and canals in Alberta and Saskatchewan diiring 1916. 



The phosphorus, potassium, and nitrogen content of the vp^aters of the 

 intermountain region, .J. E. Greaves and C T. Hirst (Jour. Indus, and Engin. 

 Chem., 11 (1919), No. 5, pp. 451-454)- — Determinations made at the Utali Agri- 

 cultural College of the total potassium, phosphorus, and nitrogen in several 

 liundred samples of water representing 58 streams in Utali, the majority of 

 which are extensively used for irrigation, are reported. 



The analyses indicate that " the quantity of potassium carried to the soil by 

 one acre-foot of water varies from 2.2 to 133.8 lbs., the phosphorus from zero 

 to 14.9 lbs., and the nitrogen from traces to 66.1 lbs. Although only a few of 

 the waters analyzed were carrying sufficient i)hosphorus, potassium, and nitro- 

 gen to the soil to supply plants with tlie necessary quantities of the respective 

 elements, yet it is evident in a number of cases that the quantity of plant food 

 carried to a soil by the irrigation water is sufficient to assist in maintaining 

 the fertility, for it is quite certain that where the waters are rationally used 

 the quantity of potassium, phosphorus, or nitrogen carried to the soils exceeds 

 that removed in the drain waters." 



The biology of waterworks, R. Kikkpatrick (Brit Museum [Nat. Hist.], 

 Econ. Ser., No. 7 (1917), pp. IV +58, figs.' 18). —The purpose of this pamphlet is 

 to outline broadly the relation of natural history to water supplies. The main 

 subjects dealt with are animals and plants that may be associated with water 

 supplies ai\d biology in relation to water purification. 



Chlorination of vi^ater, J. Race (Neio York: John Wiley cG Sons, Inc., 1918, 

 pp. VIlI-\-158, figs. 28). — This book is a compilation of information on th.e 

 various aspects and methods of water purification by chlorination. 



Chlorinated lime and halazone in the disinfection of drinking water, B. 

 Fantus (Jour. Infect. Diseases, 24 (1919), No, 3, pp. 191-203, figs. ^).— Experi- 

 ments to compare the value of chlorinated lime with halazone (2>-sulphondichlo- 

 raminobenzoic acid) as a disinfectant for drinking water led to the conclusions 

 that " chlorinated lime is a more efficient water disinfectant than halazone, 

 compared on the basis of active chlorin. It is . . . also a great deal cheaper. 

 Hence there is no reason for employing halazone in water disinfection, except- 

 ing when its superior tablet-making qualities render its use advantageous." 



Sterilization and purification of water with isotonic sodium hypochlorite 

 solution, W. G. Fralick (Med. Rec. [N. Y.], 93 (1918), No. 6, pp. 239, 240).— 

 Experiments on the sterilization of water with isotonic sodium hypochlorite are 

 briefly reported, from vviiich the conclusion is drawn that water can be sterilized 

 with small quantities of isotonic sodium hypochlorite solution and subsequently 

 neutralized by the addition of peroxid of hydrogen. Water so treated was found 

 to be sterile, free from taste, and palatable. 



Loads on highway bridges (London: The Concrete Inst., 1918, pp. 39, pi. 1, 

 figs. 31). — This is a report of a joint committee representing the Institution of 

 IMunieipnl and County Engineers and the Institution of IMunicipal Engineers, 

 giving notes, dingrams, and a table of loads for highway bridges based on three 

 bridge classifications. 



