720 



INDEX OF SUBJECTS. 



Poisoning, by fish, 415 



by foods, 411 



ice cream, 416 



infections transmitted, 413 



by meat, 415 



by milk, 416 



by sausage, 415 



by shell fish, 416 



by vegetables, 416 

 Poisons, 173 

 Pombe, 443 

 Potassium in soil, 290 

 Powdered milk, 366 

 Precipitate, 572 

 Precipitinogen, 572 

 Precipitins, anti-, 572 



auto-, 571 



co-, 573 



forensic use, 572 



iso-, 571 



mechanism of, 571 



normal, 571 



specific inhibition, 572 

 Precipitoid, 572 

 Predisposition to disease, 542 

 Preservation by chemicals, 402 



by cold, 395 



by drying, 374 



by heat, 381 

 Preservatives, alcohol, 176, 178, 408 



benzoic acid, 177, 408 



boric acid, 407 



effect on system, 406 



formaldehyde, 176, 179, 408 



formic acid, 408 



hydrogen peroxide, 179 



inorganic, 407 



nitric acid, 407 



nitrous acid, 407 



organic, 408 



ozone, 179 



preserving by chemical action, 406 

 by physical action, 406 



salicylic acid, 177, 408 



sodium chloride, 176, 406 



sulphurous acid, 180, 407 



vinegar, 177 



wood smoke, 409 

 Pressure, influence of, 168 

 Protection against disease, conjunctiva, 



547 



cutaneous orifices, 545 

 geni to-urinary tract, 547 

 inflammatory processes, 548 

 intestines, 547 

 lungs, 546 

 mouth, 546 



Protection against disease, nasal cavity. 546 

 natural antibacterial substances, 550 

 natural antitoxins, 549 

 normal agglutinins, 551 

 hemolysins, 551 

 precipitins, 552 

 skin, 545 

 stomach, 546 

 Proteins, bacterial, 535 

 as food, 91 

 in soil, 251 

 toxic, 122, 417, 535 

 Prototoxoids, 558 

 Protozoa, classification, 76 

 functions, 70 



locomotion, 71 

 flagella, 71 

 myonemes, 71 

 metabolism, 71, 82 

 reproduction, 71 



anisogamous, 74 

 binary division, 72 

 chromosomes, 74 

 conjugation, 74 

 copula, 74 

 copulation, 74 

 developmental cycle, 75 

 encystment, 75 

 isogamous, 74 

 macrogametes, 74 

 merozoites, 74 

 microgametes, 73 

 mitosis, 74 

 schizogony, 73 

 self -fertilization, 74 

 sporozoites, 73 

 zygote, 74 

 general, 68 

 groups, 10, ii 



influence on organisms in water, 202 

 parasitism, 75 



commensals, 76 

 facultative parasites, 76 

 obligatory parasites, 76 

 . saprozoic parasites, 76 

 structure, 69 



chromatin, 70 

 cytoplasm, 70 

 ectoplasm, 70 

 endoplasm, 70 

 linin, 70 

 nucleus, 70 

 organellae, 71 

 technic, 80 



Protozoal groups, 10, 1 1 

 Pseudo-yeasts on grapes, 421 

 Ptomains, 114, 115 



