1919] 



INDEX OF SUBJECTS. 



929 



Apparatus — 



calorimeter, 503, 



condensing, 311, 615. 



distillation, 311, 615. 



drying, 311, 557, 651. 



electrolytic, platinum substitute for, 

 204. 



electrometric titration, 503, 711, 7<;r), 



fat-extraction, 113. 



for determining carbon, 206. 



for determining carbon monoxid, 312. 



for determining leaf temperature, 222. 



for gas analysis, 563. 



for measuring carbon dioxid, 524. 

 * for measuring earth pressure, 582, 790. 



for measuring beat penetration in can- 

 ning, 14. 



for motor-truck impact tests, U.S.D.A., 

 689. 



for recording plant movements, 724. 



for soil analysis, 621. 



for study of plant transpiration, 

 U.S.D.A., 725. 



for study of wood vessels, 726. 



for testing aggregates, U.S.D.A., 688. 



for testing, road materials, 788, 789. 



hydrogen electrode, 503. 



oil hydrogenation, 805. 



spore-trap, 153. 



weighing burette, 311. 

 Apple — 



anthracnose, notes, 53. 



aphids, eggs of, N.J., 253. 



aphids, studies, N.Y.Cornell, 849. 



aphis, woolly, on nursery stock, 750. 



black spot, treatment, 349, 057. 



blight, notes. Mo., 650. 



blight, resistant varieties, S.Dak., 238. 



blister canker, studies, 347. 



blotch In Ohio, Ohio, 249. 



blotch, treatment. 111., 146, 750. 



brown rot, notes, 53. 



bud moths, studies, 61. 



bug, green, remedies, 341. 



canker due to Cytospora, 111., 156. 



canker, notes, 53. 



canker, treatment, Iowa, 238 ; Mo., 

 657. 



crown gall on nursery stock, 545, 750. 



crown gall, studies, Iowa, 238, 249, 348. 



curculio, remedies. III., 146. 



datanas, remedies, 662. 



diseases in Georgia, 549. 



diseases, notes, 154. 



fruit worms in Nova Scotia, 357. 



juice, concentrated, antiscorbutic prop- 

 erty, 470. 



leaf-hopper, studies, 848 ; N.Y.State, 

 252. 



maggot, notes, 341, 354. 



mealy bug, notes, 757. 



orchards, costs and profits, 835. 



orchards, decade records, Ohio, 239. 



orchards, soil management, 341 ; Iowa, 

 237 ; N.H., 43. 



pomace, use in feeding, 367. 



powdery mildew, control, 153, 249, 057. 



Apple — Continued. 



rot organism, studies, 844. 



rust, notes, Iowa, 245. 



rust, studies, W.Va., 53. 



Bcab, overwintering, 450., 



scab, studies, 655. 



scab, treatment, 340, 348, 658 ; 111., 146. 



silver leaf, notes, 750. 



skeletonizer, summary of information, 

 160. 



spot disease, studies, 844. 



sucker, notes and remedies, 755. 



tree borers, flat-headed, western spe- 

 cies, 758. 

 Apples — 



breeding experiments, S.Dak., 238. 



breeding for late blooming. Mo., 648. 



bud selection. 111., 835 ; Mo., 648. 



canned, pinholing in, 715. 



cider, from various soils, analyses, 738. 



cold-storage reports, U.S.D.A., 66. 



cost of production in Illinois, 341. 



culture in Alaska, Alaska, 40, 41. 



culture in Minnesota, Minn., 387. 



drying, 557. 



fall r. spring planting, Mo., 648. 



fertilizer experiments. 111., 146 ; Mo., 

 649; N.H., 43. 



fertilizing, 341. 



forecasting bloom. Mo., 648. 



fruit-bud development. Mo., 648. 



grading laws, 835. 



hardiness and early ripening, 144. 



industry in United States, 444 ; 

 U.S.D.A., 650. 



insects affecting in Georgia, 549. 



nutritive value, 557. 



planting distances, 835. 



producing on cheap hill land, Ohio, 539. 



priming, Mo., 649. 



pruning experiments. Kans., 41. 



pruning wounds, 238. 



resistance to cold, U.S.D.A., 444. 



sizing machine, Ohio, 539. 



spraying experiments, 160, 340, 348, 

 657, 755; 111., 146; Mo., 356; Ohio, 

 239, 538; Wis., 661. 



spraying schedule, 755. 



stocks for, Iowa, 237. 



storage. 111., 834. 



sugar content as affected by soil, 738. 



variety, " P.J.Bergius," 444, 

 Apricots — 



drying, 557. 



resistance to cold, U.S.D.A., 44. 

 Apterolophus pulchricornis n.g. and n.sp., 



261. 

 Apyrgota of Brazil, 758. 

 Arachidic acid, determination in oils, 502. 

 Arachis oil, hydrogenation, 805. 

 Arachnid pests in Scotland, 549. 

 Aranca sericata, food consumption, 463. 

 Arl)oretum, Bergius, historical review, 344, 

 Arboriculture in Spain, treatise, 237. 

 Arhutns unedo, treatise, 653. 

 Argijresthia illuminatella, studies, 61. 



