1028 



INDEX 



Oxidation of hyposulphite, 201 



influence on organisms in water, 320 



of methane, 377 



of minerals, 244 



of nitrogen, 351, 374 



of sulphur, 335 



in water, 320 



Oxidizing enzymes, 208, 216 

 Oxygen, as food, 223, 226 



relations, 225 

 Ozone, in purification of water, 325 



PACHYTYLUS migratoroides, 917 

 Parachrome bacteria, 246 

 Paramecium, carbohydrate in, 190 



caudatum, 127 



Parasites, animal in food, 583 

 facultative, 132, 660 

 obligate, 132, 660 

 of uncertain position, 139, 900 

 Parasitic microorganisms, 132, 196, 660 



molds, 48 



Parasitism, 132, 300 

 Parenchymatous tissues, action of micro- 

 organisms on, 682 

 Parthenogenesis, 131 

 Particles, comparison of size of, 182 

 Pasteurellose, avian, 808 

 Pasteurization, of beer, 530 

 of condensed milk, 531 

 of cream, 530 

 of foods, 530 

 of fruit juices, 530 

 of milk, 459, 530 

 Pathogenic bacteria, 660 

 in butter, 485 

 distribution of, 662 

 effect of, on antibody formation, 683 

 on blood-forming organs, 68 1 

 on endothelial tissues, 682 

 on epithelial tissues, 682 

 on erythrocytes, 682 

 on leucocytes, 682 

 on metabolism, 68 1 

 on parenchymatous tissues, 682 

 in food, 582 



Pathogenic bacteria of intestine, 600 



in milk, 452 



in mouth, 595 



in sewage, 338 

 Pathogenic protozoa, 660 

 Peach, leaf spot of, 975 

 Pear blight, 958 

 Peas, blight of stem, 956 



sterilization of, 534 

 Pebrine, 937 

 Pellagra, 591, 865 

 Pelomyxa palustris, 15 



cellular division in, 32 



energids of, 16 



mesomitosis in, 32, 33 

 Pemmican, 523 

 "Penicillium, 234 



brevicaule, 53, 245 



camemberti, 53, 503 

 enzymes of, 215, 220 



characters, 51 



cultural considerations, 52 



digitatum, nitrogen fixation of, 362 



expansum, 52, 53, 654 

 nitrogen fixation by, 362 



glaucum, 43 



temperatures for, 270 



roqueforti, 53 



in cheese, 502 

 Pepsin, 204, 208, 212, 214 

 Peptase, 208 

 Peptones, as food, 223 



transformation of, 398 

 Percentage index, 713 

 Perfringens antitoxin, 745 

 Period of incubation, 680 

 Periplaneta americana, 907 

 Perithecium, 39 

 Permeability, 175 

 Peroxidase, 216 

 Perry, 628 



Pestularia vesiculosa, 46 

 Phagocytic, index, 712 



theory of immunity, 723 

 Phagocytosis, 711 

 Phosphine, 242 



