RURAL ENGINEERING. 59 i 



The treatmenl for si ach worms of the horse must be preventive, since no drug 



can In- successfully used in expelling the parasites from the stomach. Particular 

 attention is given to a discussion of Spiroptera megastonia. Strongylus contortus in 



sheep produces | rly defined symptoms. In preventing infestation with this worm 



sheep should he kept away from marshy pastures, [nfested sheep may be treated 

 with bisulphid of carbon in doses of 20 to 30 drops or with a mixture of ether and 

 turpentine. 



RURAL ENGINEERING. 



The work of the Office of Experiment Stations in irrigation and drainage 

 i . S. Dept. Agr., Office Expt Stas. Circ. 63, pp. SO). — This circular contains state- 

 ments of A. 0. True and Elwood Mead before the Committee on [rrigation of 

 Arid I.an<ls of the House of Representatives, regarding the work of the irrigation 

 and drainage investigations in general, and details of the lines conducted in L904. 



Doctor Mead gives a more detailed statement of the work done during the Beason 

 of L904. 



Irrigation in the western United States, R. A. van Sandick [SeparaJU from 

 Compt. Rend. Inst. Colon. Internal., 1905, pp. JJ?>, figs. 28). — Tins is a discussion of 

 all phases of irrigation in the United states. 



The article opens with a theoretical discussion of the economic and legal questions 

 arising in the development of a new ly occupied arid region. Then follow a descrip- 

 tion and statistical account of the arid and semiarid portions of the United State-, a 

 history of the gradual development of irrigation, a description of different kind- <>\ 

 irrigation constructions with the defects that have been developed in use, a claudi- 

 cation of the different methods of obtaining water fur irrigation, a description of res- 

 ervoirs, earth and masonry dams, irrigation statistics, an account of the National 

 Reclamation Act and the work which has been projected thereunder, ami a con- 

 sideration of the relations between State and National Legislation upon irrigation. 



The paper is followed by a lengthy discussion by members of the International 

 Colonial Institute. 



The East Canyon Creek Reservoir, Morgan County, Utah, W. M. Bosi u-n 

 (Engin. Record, 52 (1905), No. 22, }>[>. 594-596, pis. 8, figs. 2).— This is a detailed 

 description of a dam which has been described before in Government publications 

 and periodicals. 



It is a rock-filled dam with steel core protected by asphaltum concrete. Methods 

 and cost of construction are given. The cost of dam and outlet tunnel was $127,361, 

 or $9.93 per acre-foot of available capacity. "From a financial point of view, the 

 enterprise has Keen more successful than the most sanguine of its friends anticipated. 

 A careful estimate of crops produced by reservoir water in the year 1904 shows their 

 value to he over $75,000, more than 58 per cent of the cost of the entire work." 



Irrigation furrow plow ( Maschim n Ztg., 8 (1905), No. 21, p. 258, figs. 2). — The 

 plow consists of a double moldboard lister plow mounted on a four-wheeled frame. 



Directly behind the plow is attached an oval-shaped roller which presses the dirt 

 into an oval-shaped ditch in the furrow made by the plow. This roller is provided 

 with scraper- to prevent clogging. Attached to the moldboards are two blades 

 extending backward at angles of about 45 degrees. The dirt thrown up by the 

 plow is spread out to both sides of the ditch by mean- of these blades which smooth 

 the surface next to the ditch. At tin- outer end of the blades are attached a few 

 harrow teeth which spread whatever dirt reaches this point. 



Underground waters of Salt River Valley, Arizona, W. T. Lki: ( U. S. 

 Survey, Water-Supply and Trrig. Paper No. 186, pp. 196, ph. 23, figs. 25).— About half 

 of this paper consists of a careful compilation of all the information that could be 

 obtained about every well in the valley, including the size, depth and yield, and the 



