AGRICULTURAL ENGINEERING. 927 



national water storage law. The i^aper also contains similar data for a reservoir at 

 Camp [McDowell on the Yerde River, and detailed information regarding the water 

 supply of the Salt and Verde River drainage basins. 



"Water resources of the State of Colorado, A. L. Fellows ( Water Supply and 

 Irrig. Papers, C. S. Geol. Survey, No. 74, PP- 151, pis. 14, figs. 5). — This jiaper deals 

 with drainage and stream measurements in the South Platte, Arkansas River, Rio 

 Grande, San Juan, Grand River, and Green River irrigation divisions of Colorado, 

 and gives a very complete compilation of hydrographic data for tlie State. 



Report of progress of stream measurements for the calendar year 1901, 

 F. H. Newell ( Wafer Supply and Irrig. Papers, U. S. Geol. Survey, No. 75, pp. 246, 

 j)ls. l.j,figs. 71). — This is the third part of the report on this subject, the first two 

 parts being issued as Water Supply and Irrigation Papers Nos. 65 and 66 (E. S. R., 

 14, p. 615). 



Observations on the flow of rivers in the vicinity of Ne-wr York City, H. A. 

 Pressey ( Water Supply and Irrig. Papers, U. S. Geol. Survey, No. 7<h j/p. lOS, )>ls. 13, 

 figs. S). 



Colonization and irrigation in Uganda and the British East Africa Pro- 

 tectorate (Jour. Soc. Arts, M {1902), No. 2605, pp. 896, S97).—T\\\^ is an abstrac-t 

 of a paper read l)y R. B. Buckley at the recent meeting of the British assooiaton at 

 Belfast, dealing with climatic conditions and possibilities of irrigation from surface 

 and underground waters. 



Irrigating pumping plant, A. \\ . Clapp [Irrig. Age, 18 {1903), No. 5. pp. 

 134-136, figs. 4). — Description of a pumping plant for lifting water from Utah Lake 

 into Jordan River. 



The limit of use of hand pumps, 31. Rixgelmaxx {.lour. Agr. Prat., n. .st'c, 5 

 {1903), No. 8, p. 260). — A 20-meter lift is considered the practical limit for such 

 pumps. 



On a leaf arrester or apparatus for removing leaves, etc., from a water 

 supply, The Earl of Rosse {Ppt. British Assor. Adr. Sd. 1901, pp. 769, 770).— "The 

 apparatus consists of a cylinder of wire gauze, of 4 ft. diameter and 42 ft. height, set in 

 an opening in a vertical diaphragm extending across the supply drain and revolving 

 twice in a minute or so round a vertical axis. The current flows through the gauze 

 cylinder in a horizontal direction. The leaves, carried down with the current, attach 

 themselves under pressure of the stream, are carried round till they reach the dia- 

 phragm, which on that side is double, with an intervening space of some 10 in., 

 which is connected with the tail-race; and at this point, the current through the 

 gauze being reversed, the leaves are detached and are carried by a portion of the water 

 toward the tail-race. Four or five per cent of the supply is ample for conveying 

 the leaves; probably much less would suffice. A very few leaves get past and onto 

 the screen, but so few that they give no trouble." A disk form of the same appara- 

 tus is also described. 



Investigations on agricultural machinery by the Bavarian Machine 

 Testing Station of Weihenstephan, H. Puchner ( Untermchungen auf dem Gebiete 

 des landwirtschaftlichen Mas<chinenvesens ausgefillirt von der koniglichen bayerischen 

 Maschinenpri'ifungsstation Weihenstephan. Munich: C. A. Seyfried A Co., 1903, pp. 215, 

 figs. 96).— This report gives a brief history of the organization and development of 

 this station and summarizes the results of trials of various kinds of agricultural 

 machinery conducted during the period from 1897-1902. 



The Danish trials of agricultural machinery, E. Jorgensex ( I)e dansle Peds- 

 Icahs og Maskinprorer. Copenhagen, 1902, pp. 199).— The trials cover the period from 

 1872 to 1901. They were conducted under the auspices of the Royal Agricultural 

 Society of Denmark by a permanent committee of the society, appointed to conduct 

 the trials. Reports of the trials have been published in the agricultural press from 



