lit-'O] CONTENTS. VII 



Page. 



Reclamation and irrigation combined, Privat 477 



The flow of water in dredged drainage ditches, Kamser 478 



Coniniunity tile drainast^ construction, Haswell 478 



Information on the divining rod, Manific 478 



Importance of liy'^ienic inspection of wells, Kroel)er 478 



Tlie purification of moorland water supplies, Hlake 478 



The sterilization of water by means of ultra-violet rays, Declcer 470 



Copper sulphate treatment to counteract algje iu large reservoirs 479 



Running water in the farm home, Norman 479 



Treatment of beet sugar plant sewage, Pearse and Greeley 479 



Utilization of war explosives in industry and agriculture, Gariboldi 480 



Utlization of dynamite in agriculture. Kuhn 480 



Forced r. delayed system of clearing stump land, Thompson 480 



Terracing of fields 481 



Modern road construction, Byrne 481 



Modern roads, Boulnois 481 



County liighway data 481 



Annual report of the highway commissioner, 1919, Bennett 481 



[Report of Board of Road Commissioners of Wayne County], Eines et al_ 481 



Road problems in the Ozarks, Harris 481 



Road-building materials in Texas, Nash et al 482 



Aggregate proportions for equal strength concrete, Johnson 482 



Concrete beam tests, Northport unit, North Platte Project, Fisher 482 



Concrete mixtures in alkiiH .soils, Mackenzie 482 



Cement joints economical in cast-iron gas pipes 482 



The mechanical properties of West African "pooli" timber 483 



Lubrication of internal-combustion engines, Osborne 483 



Low-grade fuel requires new valve adjustment, Mahoney 483 



Report of the Departmental Committee on Agricultural Machinery 483 



Handy chart for belts 483 



How to u.se the post drill press, Radebaugh 483 



The horse-power problem on the farm, Juve 483 



The present position of mechanical road traction, Conradi 484 



Farm tr.imways 484 



Protection of the tractor against freezing, Passelegue 484 



Reclaiming swamp land witli tractors, Ashby 484 



The mechaViical cultivation of rice in Cochin China, Labaste et al 484 



Retaining walls — their design and construction, Paa.swell 485 



Securing a dry cellar, Warren 485 



Silo construction, Shedd and Foster 485 



Practical hog houses for Indiana. Norman and Schwab 485 



How to make and use a self-feefler for hogs, Schwabb and Norman 485 



How to build a self-feeder for hogs, Thon)pson 485 



Self-feeders for hogs, Bohstedt—^. 485 



Electric light and pcjwer in the farm home, Daniels 486 



The design of hot water heating systems, I, II, Ehrlicb 486 



Air conditioning in private houses, Smith 486 



RUB-M. ECONOMIfS. 



The agriculture of Ohio 486 



Minutes of tlie farmers' club of IVnn.sylvania, Morris 486 



Lessons from the hlstoi-y of the public domain, Tallman 486 



Land settlement in Deinnark, Stewart 487 



Tlie develo[iment of peasant land holding in a commune of Berry, Caziot- 487 



Rural economy in the I'rovince of Santiago del Estero, Gomez 487 



A review of Philippine agriculture, Wester 487 



IZamboanga and Sulu Archipelago agricultural development!. Wester 487 



The development of English agriculture and rural life, Ashby 487 



The rural problem, Gorbea__. 488 



Service renderefl by executive committee on national production, Lima 488 



Agriculture and cooperation, Mathai 488 



Report of the Irish Agricultural Organization Society. Ltd 488 



Tlie flax inchistry of Russia and the Central Association, Martiushin 488 



The farnifis' purchase power," liow organized, Mehl 488 



Collective bargaining in agriculture, P>oyle 488 



