KUKAL EKGINEEKINQ. 683 



In the experiments with the Uncompahgre orifice it was found that the dis- 

 charge was greater than through the sharp-edged orifices witli free flow on 

 account of the comparatively high velocity of approach in the orifice box. 



In the experiments with the Azusa hydrant it was found that the actual dis- 

 charges were from 2 to 6.4 per cent less than the intended discharges. " How- 

 ever, in actual practice the orifices become larger, due to the edges rusting, and 

 the head of water is usually greater than 2 in., because a small amount Is 

 allowed to pass over the spillway or overflow." 



Wliile the value of the Colorado statute inch has been assumed to be 1/38.4 

 part of a cubic foot per second, it is concluded that this does not constitute a 

 legal definition of the statute inch, since the number of statute inches to the 

 second-foot may vary from at least 33.7 to 42.9 and still conform to the law in 

 every particular. 



Sixth biennial report of the state engineer to the governor of North 

 Dakota for the years 1913-14 (Bien. Rpt. State Engin. N. Dak., 6 (1913-14), 

 pp. 157, uls. 11). — This report covers the operations of the state engineer's office 

 during 1913 and 1914, giving special attention to drainage, highways, stream 

 measurements, and coal mining. 



Irrigation and water conveyance and diversion (Verslag Burgcrl. Openl). 

 Wcrken Ncderland. Indie, 1912, pt. 4, pp. IX-\-16S, pis. 16).— This reports the 

 progress of irrigation and water conveyance and diversion works for the 

 year 1912. 



The practical operation of irrigation works, S. G. Porter (Dept. Int. 

 Canada, Irrig. Branch Circ. 1 (1914), PP- 10). — This is a discussion of practical 

 points in irrigation. 



Report on irrigation experiments at Rochester, New York, conducted 

 jointly by Rochester Railway and Light Company and New York State 

 College of Agriculture at Cornell University, season of 1913, E. H. Fisher 

 (Manuscript (not printed), pp. 19, blue prints 10, photographs 10). — This manu- 

 script contains the results of irrigation experiments with raspberries, black- 

 berries, beans, peaches, and apples, using furrow irrigation and the so-called 

 Skinner overhead irrigation. The furrow system was used with peaches and 

 apples and the overhead system with the beans and berries. 



While the results obtained are for one season only, it is stated that they 

 were in general fairly satisfactory. It is thought to be reasonably certain that 

 irrigation will pay on berries and that there is some hope of success on other 

 crops. 



[Irrigation experiments], Gerlach (Mitt. Kaiser Wilhelms Inst. Landw. 

 Bromberg, 6 (1915), No. 5, pp. 328-359). — Four years' irrigation experiments 

 with different field and truck crops on light loamy sand soils are reported. 



During the four years irrigation on light soils was generally accompanied 

 by marked increases in crop yield, particularly in the years with greater rain- 

 fall. In such years certain crops were especially responsive to irrigation, par- 

 ticularly those whose most luxuriant development occurred during short dry 

 periods. 



It was further found that on these light soils fertilization favorably influenced 

 the utilization of irrigation water. 



Problems relating to the tile drainage of irrigated lands, H. C. Miller 

 (West. Engin., 5 (1915), No. 10, pp. 431-434, figs. 2).— The design and construc- 

 tion of a tile drainage system for irrigated land is discussed and methods and 

 a chart for calculating sizes of tile are given. 



Contributions of the chemist to the potable water industry, W. P. Mason 

 {Jour. Indus, and Engin. Chcm., 7 (1915), No. 4, pp. 289, 290).— This article 



