INDEX 



IO2Q 



Phosphorus, cycle of, 262 



in soil, 420 



Photogenic bacteria, 251 

 Phototaxis, 280 

 Phototropism, 280 

 Phycomycetes, 38, 61 



cell structure, 40 



reproduction of, 38 



Physical changes, in canned foods, 526 

 Physical forces, adsorption, 171 



in biological activities, 155 



brownian motion, 172 



colloids, 177 



crystalloids, 177 



dialysis, 175 



diffusion, 173 



dissociation, 159 



electrical conductivity, 158 



energy, 155 



ionization, 159 



osmosis, 174 



permeability, 175 



plasmolysis, 177 



reaction, 160 



solutions, 156 



surface tension, 168 

 Physical influences, 263 



electricity, 282 



light, 278 



mechanical effects, 283 



temperature, 269 



water, 263 



Physiological variation, 253 

 Physiology of microorganisms, 145 

 Pickles, 571 

 Pieris brassicae, 945 

 Pigments, 246 

 Piroplasma bigeminum, 661 



pathogenic, 894 

 Plagiomonas, 135 

 Plague, 830 



of cattle, 856 



of fowl, 860 

 Plant food in soil, 354 

 Plants, diseases of, 949 



groups of, 13 



Plasmodiophora brassicae, 969, 971 

 Plasmodium, 139 



cycle of development, 890 



falciparum, in malaria, 890, 892 



malariae, 661 



in malaria, 890, 892 



parasitic, 890 



vivax, in malaria, 890, 892 

 Plasmolysis, 177, 264 



changes due to, 89 

 Plastids, 20 



Plating methods of milk analysis, 471 

 Pleuro-pneumonia, bovine, 856 

 Plum, leaf spot of, 975 

 Pneumococcus, 799 

 Pneumomycosis, 775 

 Pneumonia, antiserum for, 746 



bovine pleuro-, 856 



broncho-, 795 



lobar, 798 



vaccine, 738 

 Poisoning, beriberi from, 591 



botulism from food, 587 



by cheese, 586 



chemical nature of, 592 



classes of food, 582 



due to saprophytic bacteria, 584 



ergotism from food, 591 



by fish, 585 



by foods, 581 



by ice cream, 586 



infections transmitted, 582 



kakke from food, 591 



by meat, 584 



by milk, 586 



pellagra from food, 591 



by sausage, 584 



by shell fish, 586 



by vegetables, 587 

 Poisons, 288 



Polar bodies, of protozoa, 130 

 Polio myelitis, epidemic, 864 



control in London, Canada, 763 

 Pombe, 631 

 Porter, 622 

 Porthesia chrysorrhea, 919 



