538 INDEX. 



Page. 



Apparatus, chemical laboratories, studies 233 



Apple grades, establishment, progress 437 



Apples, insects injurious, investigations 250-252 



Appropriations — 



Agriculture Department, 1919 and 1839-1919 299, 301-302 



insular experiment stations, 1919 360 



Aracacia, promising vegetable for Southern States 159 



Arizona, road projects approved, 1918, 1919 401, 403, 405, 407 



Arkansas, road projects approved, 1918, 1919 401, 403, 405, 407 



Arlington Farm, bulb growing, Easter lillies 149 



Army — 



cooperation of Entomology Bureau 250 



worm, Northern, outbreak and control 248 



Arsenate — 



calcium. See Calcium arsenate 



lead, insect control 252, 253, 254, 257, 267 



Asparagus, canned, danger of Bacillus botulinus 222 



Aspergillus spp. , studies 229 



Attorney General, forestry opinion, importance 479 



Autopsies on wild animals 123 



Avocados, growing, varieties 141-142, 157-158 



Bacillus — 



botulinus, danger in canned asparagus 229 



botulinus, experimental studies 121 



subtilis, relation to animal influenza 120 



Bacteriology, daiiy 97 



Ballast, ship, spread of plant enemies, possibility 530 



Bamboo, growing and uses in South 159 



Banana disease, control, Hawaii 362 



Barberry, eradication work, 1919 168-169, 386, 521-522 



Barley — 



breeding and variety testing, and diseases, studj' 151, 153, 169 



leaf rusts, control 169-170 



storage, concrete and steel bins 443 



Barnett, Claribel R., report as Librarian 337-352 



Beans — 



insects, injurious, control 257 



proteins, study 220 



velvet, new varieties 151-152 



weevils, investigations ; 249 



Beaver, mountain, habits and control 281 



Bee culture, investigations 267, 269-272 



Beef- 

 cattle, breeding and extension in South 80-82 



production — 



forecasts, 1919, and estimates, 1910-1919 5,8 



increases in Southern States 80-82 



Bees, diseases, investigations and publications 271 



Beet, sugar, leafhopper, investigations 257 



Beetle — 



Japanese — 



eradication work 254 



introduction, spread, and quarantine enforcement 517, 529 



Western pine, studies 259 



Beetles — 



flour, investigations 249 



tree, epidemic, investigations 258 



Beets, sugar, growing, farm records, labor, etc 465 



Belgium, cattle sliipments to 1 10 



Beltsville farm, experimental work, animal industry 80, 84, 85, 87, 89. 100, 101 



Bent, Rhode Island, harvesting for seed 157 



Benzene, sulphonation studies 231 



Bethesda Experiment Station work, 1919 134-135 



Beverages, studies Ijy Chemistry Bureau 223 



Bibliograi)hy, work of Library and branch libraries 343-345 



Binder twine, libers, work of 1919 154-156 



