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AGRICULTURAL ENGINEERING. 91 



pole. The length of the traces depends on the most favorable angle of 

 draft. On technical grounds long traces should be avoided unless there 

 are good reasons for using them. 



Supplemental irrigation at the Illinois Eastern Hospital for 

 the Insane, C. Gapen {Rtprixt of address he/ore the Illinois State 

 Hort. Assoc, pp. S; Irrigation Age, 9 {1890), i\"o. J, pp. 1-3, xih. 3). — An 

 account is given of irrigating 150 acres of land i)lanted to fruits and 

 vegetables. " The cost of laying the pipe was to the institution about 

 Sl,oO(>, or about $10 i^er acre. The land before these pipes were laid 

 would be regarded as high priced for agricultural inirposes at $100 per 

 acre; it now has a producing value to the institution of $500 per acre." 

 The yield on the irrigated area was far greater than the average in the 

 surrounding regions. The economy and methods of irrigation in humid 

 regions are discussed. 



Hillside terraces or ditches, F. E. Emery {North Carolina Sia. Bui. 1.21, pp. 319-326, 

 pla. 2. figs. 4). — Directious are given for the construction of liillside terraces according 

 to the method originated by P. D. Mangum, of Wake Forest, North Carolina, in 1895. 



The great flooding system of the San Joaquin Valley, T. S. Van Dyke (Irriya- 

 tlon Age, 10 {1S9G), Xo. 1, pp. S-17). 



More practical irrigation in Kansas, I. N. Pepper {Irrigation Age, 10 {1896), Xo. 1, 

 pp.7,'S). 



Irrigation and subsoiling in Montana, S. M. Emery {Irrigation Age, 10 {1896), 

 Xo.l,pp.l7,18). 



Fertilizing irrigation, J. Shomaker {Amer. Agr. {mid. ed.), 1896, July 4, p. 30, fig. 1). 



Storage reservoirs, evaporation, and percolation, F. C. Finkle {Irrigation Age, 

 10 {1S96), Xo. l,pp. 10-21). 



The Nebraska irrigation annual for 1896 {i)p.210, figs.6). — This is an account 

 edited by A. G. Wolfenberger of the proceedings of the third annual convention of 

 the Nebraska State Irrigation Association, held at Sidney, Nebraska, December 18 

 and 19, 1895, "with an appendix of valuable tables and special articles contributed 

 by irrigation experts/' including among other valuable matter a report by O. V. P. 

 Stout ou the flow of the different streams in the State available for irrigation and a 

 synopsis of the irrigation laws of Nebraska. 



Nevr grain centrifuge -with fans and grader {Deut. landtv. Presse, 23 {1896), Xos, 

 60, p. 534, figs. 2 ; 61, p. 543). — The grain is first subjected to a blast of air, which 

 removes all chafl', etc. It then passes over a sieve, which allows the grain to pass 

 through and carries over larger particles like stones, peas, beans, etc. The grain 

 then passes into a revolving cylindrical sieve, in which the small seeds of weeds, 

 etc., are taken out. It then passes into a revolving vertical sieve with sides flaring 

 upward and outward. In this the graiu is divided into 3 portions according to size. 

 In a trial at Leipsic the machine did superior work in every way. 



The Ingleton steam plow {Sci. Amer., 74 {1896), Xo. 19, p. 292, fig. 1 ).— The plows 

 work at right angles to the line of movement of the carriage to wliich they are 

 attached, and a strip 30 to 50 ft. wide is plowed for each time across the piece. The 

 cost of plowing an acre by this system is estimated at 45 cts. 



A new electric plow, F. Buutschke {Deut. landw. Presse, 23 {1896), No. 45, p. 399, 



fig-i)' 



The Brabant double plows at the local agricultural fair at Monlius, SI. Rin- 

 GEi.MANN {.Tour. Agr. Prat., 60 {1896), I, No. 25, pp. 895-902, figs. 5).— In this article the 

 author gives an illustrated description of this type of plow, with a mathematical 

 discussion of the relations of the difl"ereut parts. 

 4256— i^o. 1 7 



