INDEX. 553 



Page. 



Nonbituminous road materials, testing method, standardization 422 



North Carolina, road projects, approved, 1918, 1919 401, 403, 406, 407 



North Dakota 



road projects approved, 1918, 1919 401, 403, 406, 407 



Sullys Hill Game Preserve, work, 1919 291-292 



Nursery stock importations, origin, nature, and distribution 524-528 



Nuts- 

 bowing, investigations 145 



insects, investigations 252-253 



Oats- 

 breeding and variety testing 151, 153 



yield per acre, increase since 1908 13, 15 



Ohio, road projects approved, 1918, 1919 401, 403, 406, 407 



Oil- 

 linseed, substitutes in cresol solutions 127 



mustard, investigation 228 



railway signal, substances u?ed as substitute for lard oil, studies 128 



soy-bean, substitute for linseed oil 127 



tomato seed, investigations 220 



Oils, studies by Chemistry Bureau 219-220 



Oklahoma, road projects approved, 1918, 1919 401, 403, 406, 407 



Olives, growing and standardizing 141, 144 



Olmstead lands, title, examination 480 



Oranges 



cull, utilization 223 



Satsuma varieties, testing 142 



varieties, records 142, 143 



Orchards, extension work. South 369 



Ordnance Bureau, nitrate work cooperation of Soils Bureau 241, 245 



Oregon 



road projects approved, 1918, 1919 402, 403, 406, 407 



tree-beetle epidemic, investigation 258 



Ornithology, economic, studies 284-288 



Oysters, studies 214, 221 



Packing, use of cotton waste, etc., restrictions 505-536 



Page, Logan Waller, death notice and sketch of life 424-426 



Panama, Canal Zone, fruit flies investigations 262-263 



Paper making, resources from National Forests, studies 187, 207 



Paradichlorobenzene tests for borer control 253 



Parasites 



animal, investigations 130-132 



gipsy and brown-tail moth, progress of work 264-265 



Parks, National, birds and mammals, lists 289 



Pastures, improvement, experiments 140 



Patents for employees, work of Solicitor, 1919 - . 473, 474, 495-497 



Pathol olo^cal Division, Animal Industry Bureau, work, 1919 119-124 



Peaches, insects injurious, investigations 253 



Peanuts, growing, investigations 147 



Peas, moth, investigations 257 



Pecans, insects injurious, control 252 



Pennsylvania 



potato wart introduction and control work 517-519 



road projects approved, 1918, 1919 402, 403, 405, 406, 408 



Periodicalb 



library, number, duplicates, etc 341-342, 349 



publication by department, pages and copies, 1919 304, 312 



Perishables, protection in transit and storage 438^39 



Permits, grazing, numbers and stock grazed 192 



Pests 



household, investigations 250 



insect, control, work of entomology specialists 386 



Petree, Harris E., service and death during war 391 



Pharmacology, studies 227 



Phormium, growing experiments 115 



Phosphates, investigations, Soils Bureau 24 1 



151352 19 36 



