24 



DEPARTMENT OF AGRICULTURE, BULS. 151-115. 



Bulletin. 



"Nopal azul," occurrence, description, chemical com- 

 position, etc 



"Nopal de castilla," description, occurrence, and chem- 

 ical composition 



"Nopal," description, occurrence, and chemical compo- 

 sition • 



North Dakota — ■ 

 farm tractors — 



custom work, annual repairs, etc 



number, effect on farming industry, service, 



length of life, etc 



profitableness, fuel used, motive power main- 

 tenance, etc 



use, profitableness, etc., investigations 



wireworm pest, note 



Norway — 

 pine — ■ 



growth habits, note 



See also Pine, Norway. 

 spruce. See Spruce, Norway. 

 Nurseries — 



forest, injury to seed and roots by disinfectants in 



sandy soils 



injury of seed and roots by disinfectants, preventive 



measures 



location on sassafras soils, note 



menace by European pine-shoot moth, occurrence, 



distribution on stock, etc , 



Nursery stock — 

 forest — 



planting, cost with different species, methods, 



and soils, table 



trees, prices 



planting in eastern United States, requirements 



Nut culture, San Antonio region, experiments 



Nuts, sprouted, planting , 



Oak- 

 bark — 



consumption, 1900, 1905-1909 



use for tanning extract, comparison with hem- 

 lock 



use in tanning, advantages 



red — 



characters, growth habits, and value for forest 



planting 



planting, eastern United States 



tanning extract, consumption 1900, 1905-1909 



tongue fungus, description, occurrence, and A-alue. . 

 Oats- 

 damage by wireworm, notes 



growing — 



on fallow land, San Antonio, Tex., experiments, 



on sassafras soils 



Ohio, wireworm pest, notes 



Oil, lubricating, for tractors 



Olives, destruction by robins 



Omphalia, genus, characters, description of species 



Ophthalmic mallein — 



test for glanders, report of American Veterinary 



Medical Association '. 



use in diagnosis of glanders 



160 

 160 

 160 



174 

 174 



174 

 174 

 156 



153 



169 



169 

 159 



170 



153 

 153 

 153 

 162 

 153 



152 



152 

 152 



153 

 153 

 152 

 175 



156 



151 

 159 

 156 

 174 

 171 

 175 



166 

 166 



16-17 

 f6, 8, 9, 12, 14, 

 L 15, 16, 17 



14-15 



•6,8,9.12,14-15, 



16-19,22,24,25, 



26, 29,34, 39, 



17 



