INDEX. 643 



Army— p»k«- 



aviation work, aid In' Weather Bureau 66-67, 68. 80 



worm, control work 311 



Arsenate calcium. See Calcium arsenate. 



Arsenic compounds, effec-t on insects. 276 



Arsenicals, use in orchards, investigations 317-318 



Ascarids, hogs and sheep, control .studios 149 



Asclepias galioides. investigations 142 



Asparagus, canned, hotulinus poisoning 272 



Astragalus tetrapterus. investigations 142 



Attorney General, opinions on Federal aid road act 590 



Automobilists, information on roads condition work of Weather Bureau 69 



Autopsies, wild animals, diseases found 141 



Aviation, aid l)y forecasts and warnings of Weather Bureau 65, 66, 67, 68, 80 



Bacillus — 



botulinus. investigations 137, 260, 272 



erysipelas suis. finding in pathologic specimen 141 



Bacterins, examination and testing 139 



Bacteriology, milk, studies 116 



Bagging, cotton, importation regulations 628-631 



Baliai grass, pasture value 191 



Baits, poisoned, value in control of grasshoppers and flies 310, 335 



Balloon races, aid by forecasts of Weather Bureau 66, 67, 80 



Balloons, pilot, stations and work 79 



Banding, l)irds, work of American Bird Banding Association 362 



Barberry, eradication for wheat rust control 28, 203 



Barley- 

 acreage and production, 1914-1920, and exports 5, 6, 9 



breeding, investigations and publications 170 



diseases 199, 201, 204 



feed for work horses, test 102 



Barnett, (^LARiBEi, R. , report as Librarian 427-444 



Bassia, identification in insecticides, microscopic method 611 



Beans — 



insects, control work 312, 319-320 



protein content, studies 269 



Beavers, damages to crops, and control 352 



Bee culture, investigations 339-342 



Beef- 

 cattle — 



breeding and feeding experiments 95-96,157 



breeding, feeding, and extension work 95-98 



dressing percentage , increase by good breeding _ 34 



production cost, studies 156-157 



Beekeeping, increase as specialty 341-342 



Bees — 



disease investigations 341 



wintering investigations 340-341 



Beetle — 



carpet, investigations 312 



cucumber, control 320 



Japanese, quarantine and control work 312-314, 638 



Beetles — 



lead-boring, injury to telephone cables 321, 324 



pine , depredations and control 321-323 



Beets, sugar — 



crop, 1920, remarks by Secretary 3 



insect investigations 320 



Belteville Experiment Farm, work in animal husbandry, etc. 94,95,98,99,105,116 



Berbens spp. , susceptibility to black stem rust 202 



Bethesda Experiment Station, work, 1920 154-155 



"Better Sires' ' campaign, progress and results 34 



Beverages, adulteration, studies 258, 272 



Bibliography, work of lilirary 436-438 



Binders, road, researches 518 



