1916] ■ EURAL ENGINEERING. 385 



Note on the stage of Piroplasma bigeminum which occurs in the cattle 

 tick, Margaropus annulatus, H. Crawley {Jour. Parafdtolngy, 2 (l'J15), No. 2, 

 pp. 87-92, fig. 1). — "A parasitic protozoan was found in smears made from 

 female cattle ticks (M. annulaUis) and from crushed eggs which they had 

 deposited. The parasite has the form of a minute polycystid gregarine, and 

 is believed to represent the stage of P. bigeminum occurring in the tick. It is 

 essentially like the form figured and described by Koch as present in en- 

 gorged female ticks and their eggs, and also like the form of P. canis found 

 by Christopliers in Rhipiccphalus sanguineus. In the present case, it is of 

 interest to note that the female ticks in which the parasites were found 

 showed an unusual mortality, suggesting that the parasite is pathogenic for 

 the tick as well as for the cow. In addition to the gregarinoid parasite a 

 spirochete was found in the ticks. This parasite, not heretofore reported 

 from the United States, is perhaps the same as the form known as Spirochceta 

 theileri." 



Koundworms in poultry, life history and control, W. B. Heems and J. R. 

 Beach {California Sta. Circ. 150 (1916), pp. 7, figs. 3). — A series of control 

 experiments with Ascaris inflexa was conducted by the junior author in 

 order to test the value of certain anthelmintics and other remedies, such as 

 powdered areca nut, powdered pomegranate root bark, turpentine, gasoline, 

 iron sulphate, and tobacco. These were given both alone and in various 

 combinations in the form of pills or mixed with food. 



Tobacco stems when finely chopped, steeped in water for two hours, and 

 the stems and liquid mixed with the mash were readily eaten by the fowls 

 and gave uniformly good results. The fowls which were very badly infested 

 with roundworms were in most instances entirely freed from these parasites 

 after two doses. 



The tobacco treatment, disinfection of yards, method of handling brooder 

 chicks, and other precautions are described. 



RURAL ENGINEERING. 



State rivers and water supply commission, ninth annual report 1913—14 

 (Victoria Rivers and Water Supply Com. Ann. Rpt., 9 (1914), pp. 40, figs. 2). — 

 This reports the activities and expenditures of the commission for 1913-14, on 

 irrigation works especially. 



Report of the Water Eights Branch, Department of Lands, for the year 

 ended December 31, 1915, W. Yottng {Rpt. Water Rights Branch Dept. Lands, 

 Brit. Columbia, 1915, pp. F 56, figs. 8). — This report for 1915 embodies a brief 

 analysis of the work of the branch, including matters touched on in the re- 

 port for the preceding year. The report of the board of investigation is also 

 included. 



Accounting and business procedure as applied to the construction of large 

 irrigation projects, C. E. Bee {Engin. and Contract., 45 (1916), No. 12, pp. 269- 

 274, fiffS- 25). — This article "gives a more or less complete description of the 

 general business procedure, with the accompanying forms, suitable to the ac- 

 counting of a large irrigation or hydro-electric project. All forms and reason- 

 ings are the result or outgrowth of experience. The general plan outlined is 

 that now in use by the U. S. Reclamation Service on construction work." 



Ochoco project and Crooked River investigations, J. T. Whistler and J. H. 

 Lewis (Oreg. Cooper. Work, Dept. Int. U. 8. Reclamation Serv., 1915, June, pp. 

 98, pis. 29). — This report, prepared in cooperation with the State of Oregon, 

 deals with the irrigation and water power possibilities of Crooked River basin 

 and its relation to the lower Deschutes River power development. The features 

 to which this report has special reference are as follows: 



