SUBJECT INDEX 



455 



Light intensity effects: on duck-food plants, 21-22 



on green plants, 323-328 



on manganese content of plants, 428 

 Light measurement: development of thermoelectric 



radiometer, 328 

 Light, artificial: effects on growth of plants, 28.5-340 

 Light, intermittent: effect.s on plants, 304-310 

 Lisus^r!/7n.' effects of illuminating gases on roots. 173 



response to a-naphthaleneacetic acid, 210-211 

 Lilac: effects of ethylene chlorohydrin, 245 

 Lilies; diseases and pests, 431-433 

 Lilium: germination of seeds, 118 



hybrids, 430 



pollen storage, 429-430 

 Lilium auratum, 113, 430 

 LUium canadense, 113, 430 

 Lilium eximium, 4.31 



Lilium giganteum: development of floral axis, 431 

 Lilium harrisii, 308 

 Lilium Henryi, 430 

 Lilium japonicum,, 113, 430 

 Lilium. I ongiflorum: 430, 432 



development of floral axis, 431 

 Lilium rubellum, 113, 430 

 Lilium speciosum, 430 

 Lilium sulphureum, 430 

 Lilium, superbum, 430 

 Lilium szovitsiartum, 113 

 Lilium tigrinum, 430 



Lily mosaic methods of transmission, 432 

 Liquidambar , 90 

 Liriodendron 90 

 Lit hospermum, 42 

 Lobelia, 78 



Longevity: pollen, 429-430 



Longevity of seeds: {See Seeds: causes of degenera- 

 tion; Seeds: longevity) 

 Lotus, 30 



Lotus, Indian: (See Nelumho nucifera) 

 Lupinus albus, 416 

 Lycopodium: propagation, 434—43.5 

 Lycopodium claratum, 433 

 Lycopodium complanatum, 434, 435 

 Lycopodium lucidulum,. 43.5 

 Lycopodium obscurum, 434, 43.5 

 Lysimachia, 42 

 Lythrum, 7.5, 76 



Macropsis trimaculala: peach yellows carrier, 12 



Macrosporium sarcinae forme: 197 



effects of pentathionic acid, sulphuric acid and 

 hydrogen sulphide on germination of spores, 

 363-366 

 time and temperature effects on germination of 

 spores, 372 



Malva, 36, 43 



Manganese: solubility in soils, 428 



Manganese in plants: effects of light intensity, 428 



Maple: effects of illuminating gas on roots, 173 



Mauritia, 33 



Mazda lamps: effects on plant growth, 285-340 



Medicago, 30 



Melilotus, 29, 30, 31, 72 



Mercuric chloride: toxicity to plants, 180-185 



Mercurous chloride: toxicity to plants, 181-182 



Mercury compounds: effects on germination of 

 seeds, 185 



Mercury effects: on roses, 183 



Mercury vapor: toxicity to plants, 180-185 



Mercury vapor lamps: effects on buckwheat seed- 

 lings, 29.3-295 



Metabolism: chemical effects, 253 



effects of ethylene chlorohydrin on dormant po- 

 tato tubers, 246-249 



Metabolism of plant tissues: ethylene effects, 159- 

 160 



Methane: injury to plants, 179-180 



Methods: of applying growth substances, (See 



Growth substances) 

 o:-(2-Methylphenoxy)-propionic acid, 218 

 Microchemical studies of effect of light on plants, 



331-333 

 Mimosa, 29, 30, 151 

 Mimosa pudica, 1.54 

 Mirabilis jalapa, 332 

 Mitchella, 90 

 Modiola, 30 

 Monilia albicans, 197 

 Morphology: development of floral axis in Easter 



lilies, 431 

 Mosaic disease: dahlia, 433 



lily, 432-433 

 Musca domestica: insecticides effects on nerves and 



muscles, 348-3.50 

 piperine effects on nervous system, 352 

 toxic effects of synthetic compounds, 3.54 

 Muscles of houseflies : effects of insecticides, 348-3.50 

 Muscles of insects: effects of insecticides, 348-352 

 MyceUum: oxygen requirements effects on growth, 



435 

 oxj'gen requirements for formation, 435 

 MyosuTus, 42 

 Myrica, 90 

 Myzus persicae: transmits dahlia mosaic, 433 



IVaias flexilis, 15 

 Naphthalene: fumigation, 352-353 

 a-Naphthaleneacetic acid effects: on germination of 

 seeds, 418-419 



on plants, 206-215 

 /S-Naphthoxyacetic acid, 218 

 /3-Naphthoxypropionic acid, 218 

 Nelumbium, 29, 30 

 Nelumbo, 34, 38, .50. 71 



Nelumbo nucifera: seed coat effects on germination, 

 60-51 



vitahty of seeds, 50-51 

 Xeon lamps: effects on plant growth, 293-295 

 Nereocystis leulkeana, 166 



Nerves of houseflies: insecticides effects, 348-350 

 Nerves of insects: as affected by insecticides, 348- 



352 

 Nicotiajia, 35, 40 

 Nicotiana glutinosa, 197, 439 

 Nicotiana tabacum, 162 

 Nicotine: toxicity to Aphis rumicis, 344 



toxicity to Phlegethontius quinguemaculata, 344 

 Nigdla, 45, 75, 76 



Nigella sativa: development of dormancy in seeds, 45 

 Nitella, 21, 22, 24, 25 



Nitrate formation by peats: in composts, 425 

 Nitrogen: changes in leaves, 410—111 



changes in leaves during night, 409—110 



effect of nitrogenous reserves on growth of seed- 

 lings, 436 



insoluble organic sources, 426—127 

 Nyssa, 90 



Octane: injury to plants, 179-180 



Oenothera, 35, 36, 37, 40, 61, 75, 76 



Onopordon, 35 



Oreodoxa, 33 



Organic compounds: as fungicides, 381-383 



Organic sulphur compounds: injury to plants, 179- 



180 

 Oxalis, 42 

 Oxygen effects on: aquatic plants, 23 



dormancy, (See Dormancy) 



lily bulb dormancy, 431 



Neurospora sitophiJa, 43.5 

 Oxygen requirement: for germination in dormant 



seeds, 78-85 

 Oxylobium, 30 



