964 



EXPERIMENT STATION RECORD. 



[Vol. 37 



Oils— Page. 



color tests 13 



detennination of unsaponifiable matter. . 805 



fatty, notes 109 



rancid, evaluation ■ 114 



soluble, insecticidal value ■'>3 



spontaneous combustion, Iowa 'S8 



sulphuric acid or Maumen^ number 805 



testing 13 



use on roads 450 



vegetable, composition in relation to 



climate 418 



Oklahoma College and Station, notes 399,797 



Okra, cultiue experiments, Guam 712 



Oleander canker, description 252 



Oleoresin of Douglas fir 411 



OUgotTOpui alopecuTi, notes 463 



Olive oil- 

 index of refraction 508 



production and use, U.S.D.A 511 



Olives- 

 culture in Crimea 144 



culture in Spain ^5 



oil content 43 



Olpidium Irassicx, notes, N.Y. Cornell 455 



Onchocerca gibsoni, transmission 181 



Onchocerciasis, bovine, in South America SO 



Oncideres cingulaius, notes, Fla 660 



Onion— 



anthracnose, studies Ml 



bacterial rot and damping off 452 



black mold, notes, Ohio ZiO 



mildew, studies 553 



pink root, notes i^4 1 



Onions- 

 breeding experiments, Minn 240 



culture experiments, Guam "42 



culture experiments, Idaho 046 



fertilizer experiments 215 



fertilizer experiments, Guam 742 



varieties, Idaho 640 



OoencijTlus sp., parasitic on teat CiterpilLir... 637 

 OoipoTa — 



cUd-auTantii, notes 843 



OTijzetOTum n.sp., notes 14S 



piricola n.sp., description 250 



scabies. (See Potato scab.) 

 Ophiobolus — 



graminii, notes 24S 



herpotrichiu, notes 24S 



oryzinui n.sp., notes 14S 



Opius — 



fUtcheri, introduction into Ha.vaii h'>2 



humilis, parasitic on fruit fiy S56 



Opossum, new, from Panama 757 



Opuntia floccosa, description Hi 



Orange — 



black spot and brown spot, treatment 352 



juice, preparation, Fla 313 



Oranges- 

 composition as afTected by fert ili urs C49 



culture, treatise S.35 



frost protection 049 



June drop 154 



matiu-ity standards .U", 1. 1) 



navel, June drop !s31 



Orchard — 



grass, pollination experiments 734 



inspection. (See Nursery inspection.) 



Orchards — Page. 



clean culture v. cover crop. Wash 40 



cover crops for 833 



fertilizer experiments 240 



grass mulch for 833 



irrigation 143 



spraying experiments 242 



Orchid bacterial disease, notes 839 



Oregon — 



College, notes 98, 197, 299, 399, 499, 898 



Hood River Branch Station, report 96 



State Live Stock Sanitary Board, report. . 374 



Station, notes 98,299,399,499,898 



Organic — 



compounds, insecticidal value, determi- 

 nation, U.S.D.A 843 



materials, ashing 712 



materials, sampling device for 711 



matter, destnictlon in animal and vege- 

 table materials 713 



matter, determination in water 714 



matter, effect on soil acidity. Mo 718 



matter, effect on solubility of inorganic 



soil constituents, L'.S.D.A 422 



matter, showers of, U.S.D.A 808 



Oribatoidea, synopsis S58 



Ornamental plants, shrubs, or trees. (See 

 Plants, Shrubs, a nd Trees. ) 



Omithin, detection In plants 201 



Ornithodinos megnini — 



life history and habits 856 



notes, Mont 2.S5 



Oroba nche minor, eradication 239 



Orokinase, definition 681 



Oroya fever, studies 5.56, 377 



Orthoptera of \'irginia 461 



Ori/ctet monocerof, notes 54 



Osmotic pressure — 



in roots and loaves, relation to water 



supply 525 



of soilsolution, r61e in wheat culture 128 



table 630 



Otimhynchut ooatiu, notes, Wash 54 



Otihia sp. on sugar cane 553 



Ovary extract, effect on milk production 173 



O viducal glands, albimiin secreted by 773 



Ox saliva, diastase in 270 



Ox warble fly— 



larvne extract, effect on cattle and sheep . . 379 



life history 691 



notes 156,464 



Oxalic acid, detection in wine 207 



Oxidase — 



action, mechanism 728 



activity in plants 9,326,429,430 



ot Rhus diieniloba 411 



Oxidus gracilis, studies, Md 667 



Oxygen, dissolved, in rainwater C30 



Oysters- 

 bacteriological examination 4'JS 



shucked, cold-storage changes 311 



Paddy. (See Rice.) 

 Palm- 

 kernel meal for steers 709 



nut cake, analyses 873 



nut cake for cows 872 



nut cake, sugar content 208 



oil, detection 13 



