Nightshade spp., supposed cause of locoed condition in Mexico, 10 Nockolds, C., references to work, 12, 14 Nothnagel, H., reference to work, 65 Noyes, A. A., reference to work, 53 Oatman, H. C., experiments with alfalfa extract, 28 O'Brine, loco-plant studies and analyses and references to work, 13, 18, 19, 27, 32, 33, 54 Onsum, J., reference to work, 61 Orange Judd Farmer, reference, 63 Orfila, reference to work, 59 Oserow, reference to work, 48 Ott, Dr. Isaac, experiments with extract of Astragalus mollissimus, results, 22 Oxytropis lamberti, analyses, 20 _See also_ Aragallus. Paralysis, result of barium poisoning in man, 64 Parasites, loco plants, suggested cause of loco disease, 31, 34 Parker, W. T., reference to work, 13 Parkes, reference to work, 74 Pathological conditions in barium poisoning, 65 locoed animals on the range, 18-19 Patterson, A. H., reference to work, 12 Pauli, W., reference to work, 65 Payne, J. E., reference to work, 34 Pelletier, D., references to work, 62, 73 Pigs, barium poisoning, 74 guinea. _See_ Guinea pigs. Pilgrim, C. W., reference to work, 11 Pilliet, A., reference to work, 58 Plants, marine, barium taken up from sea, 53 Plönius, W., reference to work, 41 Poison, loco, attempts to isolate the active principle, 47 properties of certain loco plants, 35 Poisoning, barium, experimental, pathological lesions, 65 horses, sheep, and pigs, 73, 74 man, 62-65 acute cases, symptoms, results, 64 possibility of production from use of food, 64 Poisoning, loco, theoretical antidote, 71-72 symptoms, 11, 12-16, 17, 24, 26, 29, 33, 36-44 reproduction in rabbits, 29, 33, 36-44, 75