20 



DEPARTMENT OF AGRICULTURE, BULS. 326-350. 



Bulle- 

 Rice — Continued. tin No. 



grain, structure 330 



milled, coating with glucose and talc, machinery and process. . . 330 

 milling— 



and its mechanical and chemical effect upon the grain, bul- 

 letin by F. B. Wise and A. W. Broomell 330 



/machinery, description and requirements 330 



methods, ancient and modern 330 



yield of cleaned rice, by grades, and of by-products 330 



Riparia riparia riparia, occurrence in Porto Rico, note 326 



Road- 

 building — 



materials, publications of Department on 347 



rock — ■ 



physical properties, methods for determination, bul- 

 letin by Frank H. Jackson, jr 347 



See also, Rock, road-building, 

 making rock — 



examination and classification 348 



mineral composition 348 



material, testing laboratory , equipment 347 



materials — ■ 



physical properties 348 



relation of mineral composition and rock structure to phy- 

 sical properties, bulletin by E. C. E. Lord 348 



tests of various properties, equipment and work 347 



Roads, publications of Department 347 



Rock- 

 abrasion tests, Deval method 347 



compression test, method 347 



decay, mineral products, nature and value for road building 348 



hardness test, method and equipment 347 



road-building — 



cementing value, test, method and equipment 347 



methods for determination of physical properties, bulletin 



by Frank H. Jackson, jr 347 



physical properties, requirements 347 



tests free to citizens by Department, requirements 347 



toughness test, method and equipment 347 



water-absorption test, method 347 



weight test, method 347 



Rocks- 

 physical properties, relation to mineral composition and struc- 

 ture 348 



road-making — ■ 



examination and classification 348 



mineral composition 348 



secondary minerals, effect on road-building qualities 348 



Rocky Mountain region, spruce and balsam fir trees, bulletin by 



George B . Sud worth 327 



Roller- 

 land — 



cost per acre and per day 338 



service period, relation to work done 338 



service, relation to cost per acre and per day 338 



Royal Ann cherries, region of production and uses 350 



Rye- 

 analysis 328 



growing at Arlington experiment farm, variety tests 336 



introduction into United States, notes 336 



irrigation, effects of different volumes of water, experiments in 



Idaho . : * 339 



milling yields 328 



occurrence in wheat and effect on flour yield and baking quality, 



tests 328 



specific gravity, comparison with wheat 328 



yield, leading varieties, etc 336 



Page. 



2-4 



11-12 



1-31 

 7-14 

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26-27 

 85 



28 



1-28 



2-4 



4-9 



26-27 



10-11 



1-26 



3-22 



28 



4-6 



22 



13-24 



6-11 



15-22 



1-28 



2-3 



22-27 



11-15 



3-4 



3^ 



11-24 



2-4 



4-9 



13-24 



1-43 



11-12 



11-12 



11-12 



3 



21 



30-34 



2 



13 

 10 



5-6, 10 



3 



30-34 



