(10) HENRIQUES, V., and HANSEN, C. (11) 1899. [ON THE FORMATION OF FAT IN THE ANIMAL BY THE INTENSIVE 1901. VERGLEICHENDE UNTERSUCHUNGEN ÜBER DIE CHEMISCHE ZUSAM- Bd. 11, pp. 151-165, illus. (12) HENRY, W. A., and MORRISON, F. B. 1923. FEEDS AND FEEDING. Ed. 18, 770 pp., illus. Madison, Wis. (13) HUGHES, E. H. 1923. STUDY OF RICE AND RICE BY-PRODUCTS FOR FATTENING SWINE. Amer. Soc. Anim. Prod. Proc., 1922, pp. 59–63. (14) JACKSON, F. W. 1923. SOFT OILY BACON-ITS CAUSE AND PREVENTION. (15) KÖNIG, J., and SCHLUCKEBIER, J. Jour. Min. Agr. 1908. ÜBER DEN EINFLUSS DES FUTTERFETTES AUF DAS KÖRPERFETT BEI (16) LEHMANN, F. 1907. FÜTTERUNGSWESEN. II. DAS FUTTER DER MASTSCHWEINE. (17) LEMMERMANN, O., and LINKH, G. Arb. 1903. ÜBER DEN EINFLUSS DER FÜTTERUNG AUF DIE BESCHAFFENHEIT DES KÖRPERFETTES. Landw. Jahrb., Bd. 32, pp. 635–653. (18) LEWKOWITSCH, J. I. 1921-23. CHEMICAL TECHNOLOGY AND ANALYSIS OF OILS, FATS, AND WAXES. Ed. 6, 3 vols., illus. London. (19) POPOWITsch, K. 1908. UEBER DEN EINFluss der fUTTERMITTEL AUF DIE BESCHAFFENHEIT DES FLEISCHES UND FETTES BEI SCHWEINEN. 71 pp. (Inaug. Diss., Univ. Halle.) (20) QUESENBERRY, J. R. 1922. LIVE STOCK ON THE SUGAR PLANTATION. La. Planter, vol. 69, pp. 59-61. (21) ROMMEL, G. M. 1904. THE HOG INDUSTRY. U. S. Dept. Agr., Bur. Anim. Indus. Bul. 47, 298 pp., illus. (22) SHUTT, F. T. (23) 1900. PRELIMINARY REPORT UPON THE COMPOSITION AND PROPERTIES OF THE FAT IN "FIRM" AND "SOFT" PORK. Canada Expt. Farms Rpt. 1899, pp. 151–155, illus. 1901. SOFT PORK. AN INVESTIGATION INTO ITS CHARACTER AND CAUSES. Canada Cent. Expt. Farm Bul. 38, 47 pp., illus. (24) VINSON, A. E. 1904. BEITRAGE ZUR METHODIK DER ANALYSE GANZER TIERKÖRPER. 76 pp. Göttingen. (Inaug. Diss.) AMERICAN EXPERIMENT STATION PUBLICATIONS RELATING TO SOFT PORK Ala. Sta. Buls. 93, 122, 143, 154, 168, 206. Ala. Sta. Circs. 38, 40. Ala. Sta. Ann. Rpts 1917, 1918, 1919. Ark. Sta. Buls. 54, 65, 142. Fla. Sta. Buls. 157, 160. Fla. Sta. Ann. Rpts. 1918, 1922. N. C. Sta. Ann. Rpts. 1916, 1917, 1919. Tex. Sta. Buls. 131, 201, 224, 228, 242, 313. ORGANIZATION OF THE UNITED STATES DEPARTMENT OF AGRICULTURE April 10, 1926 Secretary of Agriculture. Director of Scientific Work_- Director of Personnel and Business Admin istration Solicitor. Weather Bureau___ Bureau of Agricultural Economics_ Bureau of Chemistry. Bureau of Entomology-- Bureau of Biological Survey-- Bureau of Home Economics_ Bureau of Dairying_. Fixed Nitrogen Research Laboratory- Office of Cooperative Extension Work.. Federal Horticultural Board_ Packers and Stockyards Administration _ _ W. M. JARDINE. R. W. DUNLAP. WALTER G. CAMPBELL. NELSON ANTRIM CRAWFord. W. W. STOCKberger. R. W. WILLIAMS. CHARLES F. MARVIN, Chief. E. W. NELSON, Chief. THOMAS H. MACDONALD, Chief. C. W. LARSON, Chief. F. G. COTTRELL, Director. E. W. ALLEN, Chief. C. B. SMITH, Chief. CLARIBEL R. BARNETT, Librarian. A system for the drainage of agricultural lands requires a variety of structures in addition to the tile or ditches. To permit cleaning underdrains, manholes are used at connections with laterals and at changes in alignment. Lamp holes may be installed to facilitate inspection. In soft ground and at crossings under railroads and canals, cradles and other foundations are used. Open drains subject to erosion require checks, drops, and bank protection. In the installation of such structures care should be taken to select suitable material, to prepare standard plans and specifications, to obtain proper locations, and to coordinate the structures with the rest of the system. Improper design and location of structures introduce defects in drainage systems which decrease their effectiveness. A wide variation exists in the design and cost of structures serving identical purposes. This bulletin describes the principles of design indicated by practice and experiment to be the most satisfactory in reduction of cost and of maintenance expenses and in increase in the efficiency of drainage systems. 83435°-26-1 1 |