RUBAL ENGINEERING. 185 



amiued, showing the average number of ectoparasites and endoparasites per 

 individual. 



Thirty-two per cent of the birds were found to be infested by cestodee and 25 

 per cent by nematodes. 



RURAL ENGINEERING. 



[Agricultural eng'ineering] {Agr. Student, 20 (191^), Ko. 5, pp. 345, 346, 350- 

 352, 355-365, figs. 6). — Special articles on agricultural engineering are included 

 as follows : Agricultural Engineering as a Profession, by J. B. Davidson (pp. 

 345, 346) ; Fresh Water Systems, by S. E. Brown (pp. 350-352) ; Farm Imple- 

 ments, by W. E. Taylor (pp. 355-358) ; The Place of Agricultural Engineering 

 in the Agricultural College Curriculum, by P. S. Rose (pp. 358, 359) ; Farm 

 Lighting Plans, by J. P. Stout (pp. 300-362) ; and The Harvester Expert— His 

 Training and Work, by C. O. Reed (pp. 363-365). 



Bural engineering {X. Cong. Intcrnat. Agr. Gand, 1913, Compt. Rend., pp. 

 261-291). — This section reports the rural engineering proceedings at this con- 

 gress (E. S. R., 29, p. 101). 



Water conservation and irrigation {Off. Yeurhook Aust., 6 {1901-1912), pp. 

 569-583, fig. 1). — Statistical data are given regarding water supply works, 

 including the development of artesian supplies, and irrigation systems of 

 Australia. 



The wet lands of southern Louisiana and their drainage, C. W. Okey ( U. S. 

 Dept. Agr. Bui. 11 (1914), pp. 82, pis. 4, figs, ii^).— This bulletin, intended for 

 land owners, engineers, and others interested in drainage by pumping, espe- 

 cially in the wet prairies along the Gulf coast, includes all the salient features 

 of the information so far published on this subject (E. S. R., 24, p. 287), and 

 gives also the results of later investigations. 



A description of general conditions in the Gulf coast section of Louisiana is 

 followed by a statement and brief consideration of some of the larger drainage 

 problems encountered, and emphasizing the need of more complete cooperation 

 between various interested parties in the studj' and solution of such problems. 

 The results of detailed examinations of a number of drainage districts re- 

 claimed or in process of reclamation are reported with a summai-y of such 

 results. The bulletin closes with a consideration of the problems involved in 

 land drainage by means of pumps in Louisiana, which is a continuation of 

 work previously reported (E. S. R., 26, p. 589). 



Better roads, E. T. Tannatt (Mont. Farmers' Bui. 2, pp. 29, pis. 3, fig. 1). — 

 This is a popular discussion of the general factors entering into and affecting 

 the good roads problem in ^Montana. 



Forest road construction, H. Stoetzee (Waldwegehunkunde. Frankfort on 

 the Main, 1913, 5. ed., pp. 251, pis. 3, figs. 112). — This is a reference book for 

 engineers in charge of tke design, location, construction, and maintenance of 

 forest roads. The three main divisions are (1) the lecation and design of for- 

 est roads; (2) construction, maintenance, and cost; and (3) forest railroads and 

 cable roads. 



The cause and the prevention of cracking in concrete roads, H. S. Spack- 

 MAN (Coitcrete-Ccment Age. 3 (1913), Xo. 6, pp. 261-263, figs. 3).— The author 

 gives curves of test data showing the extent to which the drainage of water 

 from the concrete may cause shrinkage within the first few hours after being 

 placed. He concludes from his own and other tests " that the change in volume 

 due to climatic influences after the concrete Mas hardened is not sufficient in 

 itself to cause the cracking noted in concrete roads," and that " the concrete 

 slab is not a continuous structure, but consists of a number of pieces of various 



