490 EXPERIMENT STATION RECORD. [Vol.35 



tion with the U. S. Geological Survey, is a summary of the available informa- 

 tion relating to the water resources of Oregon. 



Keport of progress of stream, measurements (hydrometric surveys) for the 

 calendar year 1914, F. H. Peters et al. {Dept. Int. Canada, Sess. Paper No. 

 25c (1915), pp. 508, pis. 20, figs. 5). — This report contains the results of meas- 

 urements of flow made on streams and irrigation canals and ditches in Alberta 

 and Saskatchewan during 1914. 



Water samples, L. Heimbtirgeb (Fla. Quart. Bui. Dept. Agr., 26 (1916), No. 1, 

 pp. 147-152). — This section contains the results of analyses of 25 samples of 

 water from different sources in different parts of Florida. 



Status of activated-sludge sewage treatment, G. T. Hammond {Engiir. 

 News, 75 (1916), No. 17, pp. 798-801, figs. 10).— From the results observed on 

 inspection of five working scale plants, it is concluded that the activated- 

 sludge process is not as yet out of the early experimental stage and that no 

 forecast as to its value for sewage treatment is now justified. The greatest 

 problem appears to be the economical production of a sludge of such a character 

 as to be of value as a fertilizer base. As an aid in solving this problem the 

 reduction of the volume of sludge-making materials by screening preliminary 

 to activation is recommended. 



Heclamation Board Act of the State of California as in effect on and after 

 August 8, 1915 (Sacramento, Cal.: State Reclam. Bd., 1915, pp. /F+4I). — 

 The text of the act is given. 



Hydraulic and excavation tables, A. P. Davis (U. S. Dept. Int., Reclam. 

 Scrv., Hydraulic and Excavation Tables, 1913, pp. 1^7, figs. 2).— Tables intended 

 for the use of engineers engaged in the design, construction, and operation of 

 irrigation works under the U. S. Reclamation Service are given. 



Harper's hydraulic tables for the flow of water in circular pipes under 

 pressure, timber flumes, open channels, and egg-shaped conduits, J. H. 

 Harpeu (New York: D. Van Nostrand Co., 1916, pp. 192, figs. 39).— This hand- 

 book contains formulas and tables for flow of water in circular pipes running 

 full, rectangular channels, open trapezoidal channels, and egg-shaped conduits, 

 together with a large amount of accessory information. 



The discharge from vertical pipes, C. E. Grunsky (West. Engin., 7 (1916), 

 No. Jf, pp. 182, 183, fig. 1). — A simple formula for computing the flow of water 

 from vertical pipes, which is especially applicable to computing the discharge 



from artesian wells, is given as follows: D= . — " . Z)=discharge in 



■Vl+2.525(^)' 



cubic feet per second, (f= inside diameter of the casing in feet, and 7io=height 

 in feet to which water rises in the center over the top of the casing. 



Irrigation module devised for constant flow, J. BAsrEAU (Engin. News, 

 75 (1916), No. 17, pp. 806, 807, fig. i).— This device, consisting essentially of a 

 cast-iron base and a number of galvanized sheet-iron cylinders, is described 

 and illustrated in section. It is adjustable and can be designed for any varia- 

 tion in canal level. 



Small irrigation canals lined with concrete to prevent seepage water loss, 

 C. E. Edwards (Engin. Rec., 73 (1916), Nos. 16, pp. 508-510, figs. 2; 17, pp. 539- 

 541, fig. 1). — This article gives the details of construction and cost of work on 

 the Okanogan Irrigation Project in Washington. It was found that seepage 

 losses were reduced from 51 to about 15 per cent of the total water received at 

 the headworks. 



" Part of the lining has been in use for four seasons and has given good 

 service and shows no signs of wear. Up to date it has required no expense 



