978 



EXPEKIMENT STATION KECOED. 



Page. 



Ophthalmo reaction, diagnostic value 283 



Optus tyroni, notes 150 



Opsonic index,' determination 85, 180 



Opsonins, notes q7q 



Opuntia arbuscula, root liabits 728 



spp., diseases affecting 551 



Orange diseases, notes, Ala.College 138 



maggot, notes 860 



scale, studies and bibliography, Cal. . 553 



tortricid, cork-colored, notes 150 



Oranges, cost of production in California 541 



food plant of purple scale, Cal 756 



host plant of fruit fly 758 



insects affecting, Ala.College 138 



navel, splits of 138 



Satsuma, culture, Ala.College 138 



Orchard- 

 grass, breeding experiments 830 



notes 362 



heaters, descriptions, Ind 741 



heating appliances, tests 539 



inspection. (See Nursery inspection.) 



pests, remedies 539 



surveys, statistical methods, N.Y. Cor- 

 nell 540 



Orcharding on rough lands, treatise 440 



Orchards — 



apple. (See Apple orchards.) 



fertilizers for 238 



heating, Ind 74I 



insects affecting 553 



management, Oreg 74I 



planting 597 



pollination in 44O 



protection against frost 136 



survey in Ontario County, N.Y.Comell. . 540 



Orchid diseases, descriptions 450 851 



Orchids, bacterial disease of 650 



tropical, breeding from seeds 828 



Orcus chalybeus, parasitic on- 

 black scale, Cal 656 



orange scale, Cal 554 



Oreamnos montanus, host of spotted fever tick, 



Mont 64 



Oregma lanigcra, notes 857 



Oregon College, notes 397^ 494 



Station, notes 300,397 



Organic — 



compounds, effect on action of fertilizers, 



U.S.D.A 224 



heat of combustion and so- 

 lution 872 



evolution, relation to atmospheric varia- 

 tion 272 



matter, complete destruction 206 



effect on nitrification 721 



in soils, decomposition 321, 616 



South African soils 420 



Origin of species, bibliography 470 



observations 728 



Ornamental plants, siirubs, or trees. (See 



Plants, Shrubs, omd Trees.) 

 OrniihodoTus moubata nymphs, infection by . . 460 



Ornithology in South Africa 552 



Orthezia artemisix, notes I49 



Ortho-arsenite of zinc, notes, Conn.State 856 



Page. 



Orthoclase as a source of potash 426 



Orthoptera of Connecticut 147 



Orycies rhinoceros, Ufe history 654 



Oryza barthii, studies 433 



Osmotic effects in plants, origin 531 



pressure of casein, measurement 307 



soils 217 



Ostrich breeding, treatise 772 



clucks, diseases and parasites of 487 



feathers, analyses 409 



Ostriches, breeding for plumes 473 



Otioccrus coquebertii, notes 147 



Otiorhynclms sensitivus (planatus), life history 



and bionomics g6i 



Outdoor work, book 298 



Ova, parasitic, viability 588 



white and yellow yolk of, studies 164 



Ovaries, transplanting, notes and bibliogra- 



P^y 163 



Oviductofdomesticfowls,secretory activity. . 196 



Oviducts, physiology of 670 



Owls of France, book 452 



Ox hemoglobin, hydrolysis of 22 



small diluvial primitive 768 



warble larvae, penetration from alimen- 

 tary tract 657 



warbles, control in Denmark 485 



notes 286, 781 



relation to weather conditions . . 657 



Oxamid, assimilation by plants 32 



Oxen, feeding experiments 468 



from Roman military station, skulls of. 165 



V. horses for field work in Russia 2C9 



Oxidase of fruits, notes 310 



Oxidases, detection 204 



of resting and sprou ted potatoes ... 547 



Oxidus, new genus, description 353 



Oxygen- 

 absorption by sewage effluents 406 



determination in sewage 407 



dissolved, in water, factors affecting 418 



effect on alcoholic fermentation in peas. . 731 



pressure, effect on seed germination 131, 531 



Oxygenase, activity in diseased potatoes 548 



Oxytropis lambcrti, occurrence of barium in . . . 432 

 Oxyuris vermicularis, relation to appendicitis. 678 

 Oyster groimds, inspection in United States. 761 



larvffi, collecting 473 



shell bark-louse. (See Oj-ster-shell 

 scale.) 



scale, parasites of 149 



Oysters, bacterial content, seasonal variation. 761 



Canadian, development 473 



examination. Me 868 



removal from polluted to unpolluted 



waters 67 



Pachyzanda Upunctalis, studies, U.S.D.A. . . 250 

 Packing-house products. (See Animal prod- 

 ucts.) 

 Paddy. (See Rice.) 



Paint, use on the farm, U.S.D.A 386 



Palm cake, analyses 266 



nut cake, analyses 267, 363 



effect on milk production 169 



oils, composition 23 



seed, royal, analyses 873 



