AGRICULTURAL ENGINEERING. 723 



"setting aside the proceeds of the disposal of public lands to be used in survey and 

 construction of irrigation works in the thirteen States and three Territories of the 

 arid region," are briefly described. The nature and extent of the various projects 

 now under consideration are also explained. 



Irrigation of mountain pastures in the Cevennes, F. Main (Jour. Agr. Prat., 

 n. ser., 8 \ 1904 \, No. 48, pp. 1110-712, fig. 1). — A brief general account is given of irri- 

 gation in the mountain valleys of the departments of Lozere and Ardeche. 



The development of power-pumping machinery, W. M. Barr (Engin. Mag., 

 €8(1905), No. 4, pp. 616-624, figs. 12). — This is a discussion of the more important 

 principles embodied in modern pumping machinery. 



Windmills in foreign countries ( U. S. Dept: Com. and Labor, Spec. Consular Rpts., 

 31 (1904), pp. 293). — This is a series of reports by consular officers of the United 

 States on the number, use, efficiency, source of supply, present demand for and pos- 

 sible extension of use of windmills in foreign countries. 



Air-lift pumping plant of the Redlands Water Co. ( Engin. Bee, 51 (1905), 

 No. 1, p. 8, figs. 2). — This plant is briefly described. 



An ingenious air-lift pump (Engin. and Min. Jour., 78 ( 1904), No. 25, p. 990, 

 fig. 1). — The principle of construction is briefly described. 



The cementing power of road materials, L. W. Page and A. S. Cushman ( U. S. 

 Dept. Agr., Bureau of Chemistry Bui. 85, pp. .'i, pi. 1, figs. a). — " It is the intention 

 in this bulletin to give as concise a description as possible of the investigation and 

 results of tests of the important property of road materials known as cementing 

 power. In the course of many years' investigation of this and allied problems a vast 

 amount of data has been accumulated, but the effort has been made at this time to 

 select only such as are necessary for the presentation and discussion of the subject." 



The material is drawn in large part from publications which have already been 

 noted in the Record ( E. S. R., 14, p. 540; 15, pp. 95, 826). Some additional tests of 

 the cementing value of road materials from different parts of the country made during 

 the past year are reported, attention being especially called to the wide variation in 

 the quality of road materials in different sections of the country. 



Cements, mortars, and concretes, M. S. Falk (New York: M. C. Clark, 1904, 

 /i/'. YI-\-176, pis. 4, fig*. 67). — In this treatise the author attempts to abstract, clas- 

 sify, and summarize all reliable data obtained in investigations on the physical prop- 

 erties of cement and cement mixtures, with special reference to those properties 

 which concern the engineer. 



Hauling on country roads, A. Baalsrud (Norsk Landmandsblad, 23 (1904), No. 

 32, j'j>. 383-386). — The paper gives the practical results of trials conducted by the 

 state road director of Norway, with a view to determining the energy required to haul 

 wagons having different loads, width of tires, and height of wheels. — f. \v. woll. 



Trap rocks of Palouse region as road material, C. N. Little and W. L. Zeig- 

 ler (Idaho Sta. Bid. 45, pp. 12, pis. 3). — This bulletin reports the results of a series 

 of tests of hardness, toughness, and cementing power of 12 samples of trap rocks from 

 the Palouse region of Washington and Idaho. An Olsen standard abrasion machine, 

 driven by a 3 horsepower motor, was used in the tests of hardness and toughness. 

 The cementing power was tested by means of a Fairbanks cement testing machine, 

 but the results in this case were not very satisfactory. The rocks tested were found 

 to vary widely in the qualities essential to good road materials. 



Can our farm wagons be improved? Bhutschke (Mitt. Deut. Landw. Gesett., 19 

 (1904), No. 51, pp. 315-318, figs. 5). — Various types of German farm wagons are 

 described and improvements pointed out. 



Cotton picking machine (Shreveport Tims*, 1904, Dec. 18; abs. in Jour. Sor. Arts, 

 53 (1905), No. 2721, pp. 189, 190). — An account is given of what is stated to have been 

 a successful test on a plantation near Shreveport, La., of a cotton picking machine 

 invented by George A. Lowry, of Boston. 



