THE MICROBIOLOGY OF THE ATMOSPHERE 



Mountains, the air-spora of, 131, 132 

 Mowing grass, 123 

 Mucor, 139, 153 



— mucedo, 134 



— racemosus, 134 



— spinosus, 208 



Mucoraceae, 114, 139, 142, 145 

 Multiple infection transformation, 163-5 

 Muscardine of silkworms, 6 



Muslin samplers, 97 



Mycosphaerella, 137 



Myriangium type of spore liberation, 37 



Myrica., 127 



Alyrothamnus, pollination of, 43 



Myxomycetes, 33-35, 150, 185 



— spores of. Pi. 6 ; see also genera and species 

 involved 



Nardus, pollination of, 42 

 Nashville, Tennessee, 139 

 Naucoria {Pholiota) t?iyusotis, 210 

 Navicula, 109, 149 

 Nectria cinnabarina, 208 

 Netherlands, 108, 140 

 New Mexico, 137 



— York, 160 



— Zealand, 120 



Nidulariaceae, splash-cups of, 36 

 Nigeria, 119 



Night radiation to sky, 27, 28 

 Nigrospora, 37, 119, 128 



— sphaerica, 116 

 Nolanea, 120, 123, 210 

 Non-isotropic turbulence, 43, 169 

 Non-random distribution of spores, 164 

 North America, rust migration in, 187, 188 



— Pole, sampling over, 140, 141 



— West Territory, Canada, 140-3 

 Nostoc commune, 150 



Nothofagus pollen in Tristan da Cunha, 186 

 Nuclear explosions, dust from, 190 



Oak, see Qjicrcus 



Observatoire Montsouris, Paris, 8-10, iio- 



13, 148 

 Ocean voyages, sampling on, 124-8 

 Oceanic air-spora, 10, 13, 124-8, 144-6 

 Oiditim heveae, 199 

 Onion downy mildew ; see Pcronospora 



destructor 

 Oospora, 139 



— ferrugiuea, in upper air, 134 



— ochracea in upper air, 134 

 Ophiolwlus, 18, 119, 123, 208 

 Orientation of spores, 19, 72 



Origin of the air-spora, 129, 130, 139, 144, 146 



147, 196, 197 

 Outer frictional turbulence layer, 23, Fig. 3, 



27 

 Over-dispersion, 165 

 Oxalis stricta, 185 



Pacific coast, 125, 126 

 Paecilumyces (?), 126 



Palmella, 7 



Palynology, 201 



Panacolina {Psilocybe) foenisecii, 210 



Panaeolus sphinctrinus, 210 



Panicum, pollination of, 42 



Papularia, 142, 145, 208 



Paramaecimn, 149 



Parietaria, pollination of, 43 



Paris, air sampling in, 8-10, 1 10-13, 148 



Pasteur's filter sampler, 4, 5, 97 



Paxillus ini'olutus, 17 



Penetrators, spores as, 82, 83 



Peuiclllium, 12, 82, 85, 114, 116, 119, 120, 



122, 126, 134, 136, 137, 139, 141-5, 149, 



153, 159,208 

 ■ — atro-viride, 134 



— crustaceum, 135 



— cyclopium, 135 



— glaucum, 139 



— viridicatum, 129 

 Peniophora gigantea, 83, 89, 97 

 Periconia, 116, 120, 134 

 Peronospora destructor, 16, 178, 184 



— parasitica, 208 



■ — tabacina, 116, 165, 170 

 Pertusaria, ascospore discharge, 82 

 Pcstalozzia, 137, 141 

 Petri dish, spore deposition on, 73, 92 

 Petri's air sampling method, 97 

 Petroleum jelly adhesive, 103 

 Phaeohulgaria inquinans, 208 

 Phaeokpiota spectabilis, 210 

 Phlcum, 16, 42, 212 

 Pholiota, 210 



— myosotis, 210 

 Phoma, 92 



— hibcrnica, 125 

 Pohlia cruda, 151 



— nutans, 151 



Phormidium lurid um nigresccns, 140 



Photophoresis, 85 



Photoreactivation, 193 



Phycomycetes, spores of, PI. 5 ; see also genera 



and species involved 

 Pliyllitis, 210 

 Phyllosphere, 115 

 Phyllosticta, 141 

 Phillyrea, 43 

 Physarum nutans, 150 

 Phytophtlwra, 82, 120 



— infestans, 35, 116, 118, 163, 165, 170, 177, 

 178, 184, 189, 199 



Picea, 15, 16, 127, 180, 186 



Pick-up of spores by mist droplets, 35 



Piedmont silk industry, 6 



Pikis, Finland, 150 



Pilobolus, 37 



Pine, see Pinus 



Pink yeasts in air, 126, 139, 149 



Pinus, pollen, 15, 16, 40, 43, 117, 127, 128, 



149, 171, 180, 186, 212 

 Piricularia, 116, 119 

 Pitliomyces chartarum, 208 

 Plane, see Platanus 

 Plantago, 43, 117, 127, 212 

 Plantain, see Plantago 

 Plasmopara viticola, 92 



242 



