rNDEX. 1133 



Nursery stock, forest, diseases, control studies and experiments 137 



inspection and quarantine for insect control 648-651 



Nut culture, investigations 133, 453 



disease, control work 138 



oils, chemical composition, studies and proposed work 559, 600 



Nutrition, animal, investigations 322 



investigations, Experiment Stations Office 109-110, 221-228, 844-845 



proposed work 845 



plant, Investigations 139, 391, 436, 614 



problems, assistance by department 223-224 



publications, demand, work, etc 222-223 



Oak, cork, introduction and growing 120, 513 



Oats crop, 1912, remarks by Secretary 14 



investigations and breeding for improvement 426 



price, 1912 20, 21 



sulphuring," study 135 



winter, note 122 



Object-lesson roads, remarks by Secretary and Department w ork Ill, 848-868 



Observations and Reports Division, Weather Bureau, work 276-283 



Observatory buildings. Weather Bureau, location, cost, etc 295-296 



Mount Weather, establishment and work, 1903-1912 189-191 



Observers, cooperative, work with Weather Bureau, extension 184 



Ocean forecasting, work and methods of Weather Bureau 40-41, 178, 183-184 



meteorological charts 283-284 



Occupancy trespass cases, work of Solicitor's Office, 1912 1073-1074 



Office. See Experiment Stations Office; Roads, Public, Office; Solicitor, 

 Office. 



Officers, principal, Agriculture Department, titles, salaries, etc 1085-1092 



Ohio, tuberculosis investigations, cooperative 354 



Oil, olive, adulteration. New Orleans 582 



plants, studies 140 



wood, tree from China, successful growing 424 



rose, production, experiments at Arlington Farm 408 



Oils, edible, from vegetable sources, chemical composition, studies 559 



essential, adulteration and misbranding, studies 568 



detection 559 



vegetable, investigations 410 



volatile, crop sources, investigations 410 



extraction from wood by distillation 545 



Oleo oil, exports, remarks 22 



Olive oil, adulteration. New Orleans 582 



Olmsted, Victor H., report as chief of Statistics Bureau 781-798 



Omaha laboratory, food and drug inspection work 582-583 



Onion Rowing and seed production, investigations 457 



msects, control studies 644 



thrips, control work, studies, etc 79, 642-643, 644 



Opium adulterant of confections, entry denied 574 



Opinions, work of Solicitor's Office for Forester 901-902 



Orange thrips, control work in California 78, 645-646 



spraying for control, California 78 



Oranges, frozen, detection method » 558, 584 



Orchards, planting, nursery stocks and cover crops, notes 124 



Organic matter, soil, origin and study 613-615 



Oregon, National P'orests, timber, annual yield 493 



Umatilla field station, work 448 



Ornithology, economic work, outline for 1913 679 



Ostertagi bullosa, occurrence in western sheep • 380 



Oysters, adulteration, investigations, Chemistry Bureau 205 



canning, investigations 584 



polluted, inspection and seizures 572 



Pacific coast, grain handling investigations 419 



Packing house products, exports, remarks 23 



Page, L. W., report as director of Office of Public Roads, 1912 847-887 



Paint investigations, Chemistry Bureau 595 



