1917] RUR.4.L ENGINEERING. 693 



Another cestode from the young cat, J. E. Ackekt and A. A. Gbant {Trans. 

 Amer. Micros. Soc, 36 (1917), No. 2, pp. 93-96).— The authors find that the dog 

 tapeworm (Tcenia pisiformis) may develop in the young cat {Felis domestica) 

 and that evagination of Cysticercus pisiformis occurs in the duodenum of the 

 domestic liitten. 



Some of the infectious diseases of poultry, E. M. Pickens {Cornell Vet., 

 7 {1917), No. 3, pp. 151-184). — A systematic summary of information on the 

 more important infectious diseases of poultry. 



RITRAL ENGIWEERIKG. 



Flow throug-h sharp-edged V-notches or weirs, E. W. Dokbleb and F. H. 

 Rayfield {Cornell Civ. Engin., 25 {1917), No. 8, pp. 389-397, figs. 7).— Experi- 

 ments are reported on the flow of water through V-notch weirs to determine the 

 experimental coefficient m in the formula 



Q=m8/15 tan l/2«2 gh "s 

 for heads higher than those used in previous experiments by others. Four 

 notches were studied. The smallest had the Cippoletti side slopes of one hori- 

 zontal to four vertical, an angle of approximately 28°. The other three angles 

 were 60, 90, and 120°. Heads were used up to 3 ft. 



It was found that " the 60° notch has the lowest average coefficient, about 

 0.578, with the value for the 90° a very little higher, about 0.58. The average 

 values of fi for the 28 and 120' notches are respectively about 0.59 and 0.591, or 

 about 2 per cent higher than the values for the intermediate notches. These 

 averages are for the medium heads. . . . For all of the notches there is a rapid 

 increase in the value of the coefficient at the high heads. This increase is, no 

 doubt, partly due to the velocity in the channel of approach. . . . 



" For those runs for which the velocity measurements were made, the mean 

 heads were increased by their re.spective velocity heads and another coefficient 

 computed. Considering these coefficients, there is still a marked increase in 

 the value of the coefficients which tends to show that it is not entirely due to 

 velocity. The nearness of the edges of a notch to tlie sides of the channel has 

 an effect upon the coefficient." 



Spray irrigation, G. H. Tolley {Water Conserv. and Irrig. Com., N. S. Wales, 

 Bui. 1 {1917), pp. 32, figs. 36). — This pamphlet discusses the general principles 

 of spray irrigation, and describes service tests of several different systems of 

 spray irrigation. 



Irrigation laws of the State of Washington, compiled by I. M. Howeix 

 {Olympia, Wash.: State, 1916, 2. ed., pp. 173).— The text of the laws is given. 



Irrigation revenue report of the Bombay Presidency, excluding Sind, 

 1914-15 {Irrig. Rev. Rpt. Bombay Pres., 191^-15, pp. 49). — Data on expendi- 

 tures and revenues for irrigation works in Bombay for the year 1914-15 are 

 reported. 



Annual report, Ministry of Public Works, Egypt, 1915-16, M. MacDonajld 

 {Ann. Rpt. Min. Pub. Works Egypt, 1915-16, pp. 87, pis. 9). — A large part of 

 this report is devoted to drainage and irrigation projects in Egypt, especially as 

 they are affected by the European war. 



[Water analyses] {An. Min. Agr. Argentina, Secc. Geol., Mineral, y Min., 11 

 {1916), Ne. 4, pp. 53-63). — Analyses of 13 samples of 8 water supplies from 5 

 Provinces in Argentina showed 7 of the supplies to be potable. Analyses of 

 102 samples of 35 water supplies of 12 Provinces showed 19 samples potable. 



Reaeration as a factor in the self -purification of streams, E. B. Phelps 

 {Jour. Indus, and Engin. Chem., 9 {1917), No. 4. pp. 403-405). — It is. pointed 

 out, on the basis of work by the U. S. Public Health Service, that " in the de- 

 velopment of the maximum economic use of a stream, its capacity to dispose of 



