RURAL ENGINEERING. 487 



Practical sug'g'estions given for building -wire fences and concrete posts, 

 R. N. Wheelee {Engin. Rec, 12 {1915), No. 12, pp. 361, 362).— This article ex- 

 plains in detail methods of building wire fences and concrete posts and gives 

 practical suggestions based on fence-building experience. 



A course of study in farm engines, R. Olney and P. A. Tanner {Farm 

 Engin., 1 {1913), No. 2, p. U; 1 {1914), ^os. 3, pp. 16, 22, figs. 4; 4, P- 7, figs. 4; 

 5, pp. 12, 13, figs. 2; 6, pp. 12, IS, figs. 2; 7, p. 10, figs. 2; 8, p. 1, fig. 1; 2 {1914), 

 Nos. 1, p. 7; 2, p. 25; 3, p. 52; 4^ p. 69; 5, p. S9; 6, p. 120, figs. 2; 2 {1915), Nos. 

 7, pp. 144, 146, figs. 5; 8, pp. 166, 167, figs. 3; 9, pp. 190, 191, figs. 8; 10, pp. 226, 

 227, 239, figs. 6; 11, pp. 250, 251, figs. 5; 12 p. 272, figs. 4; 8 {WIS), Nos. 1, pp. 

 4, 5, figs. 4; 2, pp. 29, 33; 3, pp. 49, 50).— This is an exposition of the principles 

 involved in the construction and operation of farm gas engines. 



Burning bagasse, E. W. Kekr {La. Planter, 54 {1915), No. 20, pp. 315-318, 

 figs. 4). — The author reports data from various experiments with bagasse as a 

 fuel for sugar refineries. 



It is shown that the loss of heat in the chimney gases is the greatest heat 

 loss and this loss is much greater for bagasse than for other fuels. Other 

 data show that "very high rates of combustion are [not] necessary." It is 

 stated that the less moisture there is in the bagasse the smaller the grate can 

 be without danger of choking the furnace. " This means that in Louisiana 

 relatively large grates and correspondingly low rates of combustion are best." 

 With reference to the loss due to incomplete combustion of carbon " it may be 

 said that this loss is usually small as compared with the loss due to excess 

 air, etc." 



The results of a series of tests on three typical bagasse boilers are also 

 reported, the object of which was, among other things, to determine the relative 

 merits of varying sizes and forms of bagasse furnaces. The outfits tested 

 were a 150-horsepower H. R. T. boiler with a standard Dutch oven, a 250- 

 horsepower H. R. T. boiler with a flat-top Dutch oven and the entire setting 

 inclosed in steel lined with asbestos, and a 250-horsepower H. R. T. boiler 

 with an extended Dutch oven. The duration of tests varied from 5.7 to 8 hours, 

 the average being 7.3 hours. The best efficiency was shown by the second out- 

 fit. Of the three boilers this one had the smallest combustion volume. The 

 third outfit with twice the combustion space was second in eflSciency. " The 

 results of the tests, though perhaps not absolutely conclusive, at least point 

 to a reasonable doubt as to the necessity of very large and elaborate fur- 

 naces. . . . Too much can not be said about the importance of care in operat- 

 ing bagasse furnaces, especially as regards uniformity of bagasse feed, clean 

 fires, and clean heating surfaces." 



See also a previous note on this subject by Deerr (E. S. R., 30, p. 891). 



Agricultural drawing and the design of farm structures, T. E. French and 

 F. W. I\'ES {Neio York: McGraw-Hill Book Co., 1915, pp. YIII-\-130, figs. 182).— 

 This text-book is intended primarily for students in agriculture and agricultural 

 engineering, and describes and illustrates the principles and processe.s involved 

 in the design and drawing of farm structures, including a variety of problems 

 of progressive difficulty. The following chapters are included : Theory and tech- 

 nique, working drawings, farm structures, maps and topographical drawing, 

 pictorial drawing, and construction data. A selected bibliography of related 

 work is appended, which includes, among other things, a number of the bulle- 

 tins of the U. S. Department of Agriculture and of several state experiment 

 stations. 



Plans for dairy barns and milk room, C. L. Stahl {Dept. Agr. and Immigr. 

 Va., Dairy and Food Div. Bui. 50 {1915), pp. 14, pis. 15, fig. J).— This bulletin 



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