586 EXPEEIMENT STATION RECORD. [Vol.36 



Bectaiigular wooden flumes, J. C. Stevens {Engin. News, 76 {1916), No. 25, 

 pp. 1160-1162, fig. 1). — "The object of this article is to touch briefly on a few 

 important points, connectefl with the design and constriiction of wooden flumes 

 for irrigation and power purposes, that have not been treated either iu text- 

 books or in technical ai'ticles." 



Method of making drainage and improvement assessments, P. A. Cuppeb 

 (Enyin. News, 76 (1916), No. 21, pp. 975, 976).— Suggestions for appraisal work 

 in drainage and similar improvement districts are given. 



The hygiene of water, A. Gartner (Die Hygiene des Wassers. Brunswick: 

 Friedrich Vieiveg & Son, 1915, pp. 952, pis. 11, figs. 93; ahs. in Ztschr. Angew. 

 Chem., 29 {1916), No. 17, WirtschaftUche?- Teil, pp. Ul, i^,?).— This is a hand- 

 book for engineers, waterworks superintendents, chemists, and medical officials. 

 It deals with the sanitary aspects of domestic and other water supplies and with 

 the chemistry and bacteriology of drinking water in general. Features of water- 

 sup))ly systems and apparatus are also dealt with. 



Disinfection of drinking water by the successive action of sodium hypo- 

 chlorite and hydrogen peroxid, E. Doyen and Toda {Compt. Rend. Soc. Biol. 

 [Pai-is], 79 {1916), No. 6, pp. 232, 233; abs. in Chem. Ahs., 10 {1916), No. 19, 

 p. 2487). — Experiments on the treatment of sterilized, distilled river and lake 

 water to which 24-hour cultures of Bacillus coli and Eberth bacillus were added 

 in a minimum amount of 20,000 per cubic centimeter are reported. 



Labarraque solution containing 7.45 gm. of sodium hypochlorite (equivalent 

 to 3.5.5 gm. of chlorin) per liter and officinal hydrogen peroxid containing 34 gm. 

 hydrogen peroxid per liter were employed. When the Labarraque solution was 

 used in an amount corresponding to 1 mg. of chlorin per liter of water, the water 

 was sterilized in one minute. It is recommended, however, that an amount 

 equivalent to 3 mg. of chlorin per liter of water be used, and that sufficient 

 hydrogen peroxid be added at the end of five minutes to cause the evolution of 

 all the oxygen of the sodium hypochlorite. Impure water treated successively 

 with sodium hypochlorite and hydrogen peroxid was more palatable than that 

 treated with sodium hypochlorite and sodium hyposulphate. The sterilizing 

 action was also much more effective in the former than in the latter case. It 

 is noted that the hydrogen peroxid used had no appreciable bactericidal action. 



Laboratory manual of bituminous materials, P. Hubbard {New York: John 

 Wiley d Sons, 1916. pp. XI +153, figs. 39; rev. in Engin. Rec, 74 {1916), No. 26, 

 p. 778). — This manual is primarily intended as a laboratory guide for students 

 and others, its object being to describe methods in sufficient detail to enable the 

 performance of the more common and widely used tests with a reasonable degree 

 of accuracy. It is divided into three parts. 



Part 1 gives general information on definitions of materials, tests, and uses; 

 types and classification of bituminous materials, especially those for road and 

 paving use ; refining processes ; and laboratory methods. Part 2, methods of 

 testing, covers tests for density, consistency, and solubility of other than bitumi- 

 nous aggregates; heat tests; miscellaneous tests; and the extraction of bitumi- 

 nous aggregates and recovery of bitumen and aggregate. Part 3, characteristics 

 of the more important bituminous materials, deals with fluid petroleum products 

 and emulsions, semisolid and solid petroleum and asphalt products, refined tars 

 and tar pitches, creosoting oils or wood preservatives, and bituminous aggregates. 



Bead material surveys in 1914, L. Reinecke {Canada Dept. Mines, Geol. 

 Survey Mem. 85 {1916), pp. yni+21',, pis. 7, figs. i6).— This report is published 

 in four parts. 



Part 1 is a description of the various kinds of country roads, of the materials 

 used in their construction, of the different varieties of stone outcropping at the 

 surface of the earth, and of their comparative value as road-making materials. 



