1030 EXPERIMENT STATION RECORD. 



A new method of extracting olive oil, A. Fl-xaro {Staz. Sper. Agr. liaL, 35 

 {1902), No. 11-12, pp. 916-921). — A description is given of a method of oil extraction 

 that is said to yield several per cent more oil than that secured by the ordinary 

 process. 



Modern American tanning {Chicago: .Tacohsen Pub. Co., 1902, pp. 292, ph. 14,fig><- 

 2). — This is a compilation of articles on the manufacture of leather which appeared 

 originally in Hide and LealJu'r. 



AGRICULTURAL ENGINEERING. 



Report of irrigation investigations, Humboldt River Valley, Nevada, J. D. 

 Stannakd {Nevada Sta. Bid. 54, pp- 91, pis. 34)- — A report is given of observations 

 on the extent and character of irrigation practiced in the valle}^ irrigation works, 

 crops grown, claims to water and their adjudication, the unit of measurement, and 

 the distribution and more economical use of water are discussed, with suggestions as 

 to the improvement of the system and methods now in vogue. 



Eleventh Biennial Report of the State Engineer of Colorado, 1901-2, 

 A. J. ^R'Cl'xe {Denrer, 1902, pp. 334, dU. ). — This volume is devoted largely to reports 

 from various superintendents of irrigation and water commissioners, crop statistics, 

 and other routine matters, but contains special report -i on Drainage and Seepage 

 Measurements, by C. G. Elliott; and The ^leasurement of Water, l)y A. L. Fellows 

 (E. S. R., 13, p. 1108). 



Irrigation works of India, R. F. Patterson {U. S. Consular Epts., 71 {1903), 

 No. 270, pp. 356-359). — A brief account of these works, including statistics of capital 

 invested, revenues, and area irrigated. The capital outlay to the end of 1900-1901 

 is given as $128,181,526, the net revenues $8,740,016, the area irrigated 13,547,986 

 acres. 



Irrigation in Spain and North Africa, J. Brixiies [Thexitt, Vnir. Parix, 1902, 

 pp. XVII ^ 51,"^, fig.-<. 63, uHtpx 7). — This treatise deals with geographical conditions, 

 methods, and organization and is styled a study in human geography. The regions 

 . chosen for study are the Spanish Peninsula, Algiers and Tunis, and P^gypt. There 

 is added a bibliography of a large number of publications on irrigation used or cited 

 in the preparation of this treatise. 



The Nile dams and reservoir, Sir B. Baker {Pop. Sci. Mo., 62 {1903), No. 6, 

 pp. 550-561, Jigi^. 6) . — This is an address given before the Royal Institution of Great 

 Britain. 



A self-adjusting weir {Irrig. Age, 18 {1903), No. 5, pp. 138, 139, figs. ,5).— A 

 brief statement of the claims made for such a device, invented by C. C. Carlisle, assist- 

 ant State engineer of Wyoming. The principal feature of this weir is a short moval)le 

 conduit, connected with floats, which moves up and down over the end of a fixed 

 conduit (which is a little smaller in diameter) as the level of the water in the canal 

 rises and falls. The joint between the movable and fixed conduits is sealed with 

 mercury. 



On the conversion of a tidal marsh into a meadow, G. Becker {Deut. Landw. 

 Pressc, 30 {1903), No. 15, pp. 118, 119). 



Recent progress in the field of agricultural machinery {Fi'dding's Land\i\ 

 Ztg., 51 {1902), Nos. 11, pp. 410, 411; 12, pp. 450, 451; 13, pp. 4<^8-492; 14, pp. 521-524, 

 figs. 2; 15, pp. 556-559, figs. 2; 16, jjp. 601-603, figs. 2; 17, pp. 638-641, figs. 3; 18, pp. 

 681-683, fig. 1; 19, pp. 725-727, fig. 1; 20, pp. 765-767, figs. 2; 21, pp. 797, 798, fig. 

 1; 22, pp. 832-835; 23, pp. 871-874, figs. 2; 24, pp. 910-914, figs. 6).— This is a series 

 of articles on this subject by different authors, including H. Puchner, A. Nachtweh, 

 and W. Heerberger. The subjects discussed in these articles include root and straw 

 cutters, harrows and soil levelers, hay-tedder and pre.ss, plows, scythe-sharpening 

 machine, hitching device for horse powers, root digger, mowers and reapers, sta- 

 tionary and portable steam engines. 



