RURAL ENGINEERING. 383 



contagious pleuro-pueumonia does not transmit tlie disease. It may be trans- 

 mitted, but not always, by placing bronchial secretions on the mucous mem- 

 branes of the uninjured nasal cavity or mouth. The ciliated epithelial cells in 

 the bacteria-free secretions of the bronchi show peculiar iuclosures which 

 seem to be the result of degenerative changes rather than parasites. 



"Horses that had been injected with the pulverized parts of diseased lungs, 

 and which did not thus contract this disease, could not afterwards be infected 

 by the usual method. Foci of lung tissue rubbed up with glycerin and pre- 

 served for a long time seem to prevent a later infection when injected into the 

 lungs or under the skin." 



Spirochetosis of fowls, Kiessig (Centbl. Bald, [etc.], 1. AM., Ref., 61 (1914), 

 Ko. 7. pp. 193-20S). — This review of the literature on the subject includes a 

 bibliography of 59 titles. 



The staining of microfilariae, F. FtJLLEBOEN (Centhl. Bakt. [etc.], 1. AM., 

 Orig., 73 (1911,), No. 6. pp. 421-Uh P^-i- 2, figs. 3).— A discussion of the tech- 

 nique. 



The disinfective action of Cresepton in comparison with creolin and 

 liquor cresoli saponatus, Wolff-Eisner {Deut. Tieidrztl. Wchnschr., 21 {1913), 

 Ko. U^ PP- 702-704; abs. in Berlin. Tierdrztl. Wchnschr., 30 {1914), No. 1, 

 p. 9). — The author having conducted experiments concludes that liquor cresoli 

 saponatus, creolin, and Cresepton are very similar in their disinfective action, 

 and that their cost is the first thing to be considered. 



RURAL ENGINEERING. 



Twelfth annual report of the Reclamation Service, 1913 (Ann. Rpt. Recla- 

 mation Scf-v. [U. S.], 12 {1913), pp. 382). — This report relates in particular to 

 work completed and in progress during the fiscal year ended June 30, 1913, 

 with explanatory information regarding previous operations. 



Report of irrigation and reclamation works department (Rpt. I trig, and 

 Reclamation Works Dept. So. Aust. 1913, pp. 27, pis. 7). — ^^This report covers the 

 period, from August, 1910, to June, 1913. 



Irrigation studies, A. MIjntz and E. Lain6 (Vie Agr. et Rurale, 2 (1913), 

 No. 48, pp. 557-559). — Studies of module, grade, state of vegetation, perme- 

 ability of the soil, and unit area of the plat to be irrigated, relative to economy 

 in the use of irrigation water, are briefly noted. It is concluded that a rational 

 choice and consideration of these factors will in a large measure reduce the use 

 of irrigation water in excess of that amount actually required by the crop. 



Quantity of water consumed in the cultivation of sugar cane, J. Guardiola 

 {Bol. Dir. Gen. Agr. [Mexico], Rev. Agr., 2 (1912), No. 2, pp. 101-107).— 

 Methods of computing the amounts of water necessary for the irrigation of 

 sugar cane are outlined, as governed by local conditions relating to duty of 

 water, soil, climate, and rainfall. 



The control of water as applied to irrigation, power, and town water 

 supply purposes, P. A. M. Parker (New York, 1913, pp. VII+1055, figs. 273; 

 rev. in Engin. News, 71 (1914), No. 12, pp. 646, 647). — This is a rather extensive 

 .contribution to the literature of applied hydraulics containing a large number 

 of data, formulas, and mathematical demonstrations. The chief topics dis- 

 cussed are the theory of hydraulics, gaging of streams and rivers, weirs and 

 weir formulas, orifices, collection of water and flood discharge, dams and reser- 

 voirs, open channels, filtration and purification of water, municipal water sup- 

 plies, irrigation, and silting in canals. 



rnder gaging of streams and rivers a novel method called chemical gaging is 

 described. In the remaining chapters of the book are treated such varied 



