INDEX. 645 



Borer — Continued. Page. 



peach, control 314 



sugar-cane, spread and control 333-334 



Bots, control, investigations of remedies 612 



Botulism, investigations 137, 272 



Boys' clubs, enrollment and work 472, 481-483 



Breeding — 



animals, certificates, issue in 106 



crop, investigations 161-183 



dairy < ulllc, o::p:Timo: tp 118. 157 



grounds of migratory wild fowl 364-365 



live stock, improvements, etc 34-35, 91-95, 457, 462 



poultry experunents 103-104 



Bridgeport Harbor, Conn., sewage-disposal effluents, report 270 



Bridges- 

 designs and engineers supply to States 520 



projects in National Forests 342 



Brown-rot, prunes, control 219 



Brown-tail moth, control work 326-329, 637 



Bud selection, fruit improvement 171-172 



Buckwheat — 



acreage and production, 1914-1920 56 



India, digestion studies 487 



Buffalo, numbers on game reservations 368, 369 



Buildings — 



dull rooms for eggs and poultry, construction 270-271 



farm, designs preparation 527. 528 



new, for department need, recommendations 57-58 



Bulks, growing, investigations 178-179 



Bull associations, cooperative 109 



Bunt, wheat. See Smut. 



Bureau. See Animal Industry Bureau; Chemistry Bureau; etc. 



Butchering, hogs, demonstration work 99 



Butter — 



adulteration, examination 259, 265 



inspection at markets 541 



inspection by Dairy Division 111-112 



Cabbage, insect control 320 



Cables, telephone, injury by beetles 321, 324 



Calcium — 

 arsenate — 



cost and results in boll-weevil control 329-331 



inspection and investigations 608-609, 611-612 



shipments to Southern States, 1919, 1920 608-609 



standardization 28 



cyanamid, utilization for fertilizer 295, 296, 300 



oxalate, studies 273 



California — 

 citrus — 



fruit growing, fertilizing, and improving 171-172 



insects control 337 



cotton grooving possibilities 163 



date growing 180 



Calorimeter, respiration, researcli work 487, 488 



Calosovia sycofhanta, enemy of gipsy moth 328 



Camphor, growing and manufacture 193 



Canal Zone, insect investigations 339 



Cane, sugar — 



insect control 333-334 



mosaic disease, control work, Porto Rico 461 



varieties, testing at Virgin Islands experiment station 464 



Canker — 



citrus, eradication 220 



flax, types 200-201 



Canna edulxs, starch plant, growing in Florida 186 



