INDEX 



1035 



Serum, antitetanic, 744 

 antitoxic, 740 

 Dorset-Niles, 746 

 hyperimmune, 746 

 preservation of, 747 

 Sewage, anaerobic organisms, 332 

 disinfection, 343 

 fermentation of, 332 

 cellulose, 333 

 fats, 334 

 proteins, 332 

 urea, 335 

 filters, 341 

 longevity of pathogenic organisms 



in, 338 



microorganisms of, 330, 331 

 cultivation of, 340 

 destruction by biological proc- 

 esses, 343 



by chemical processes, 343 

 life in filters of, 339 

 oxidizing bacteria, 337 

 pathogenic bacteria in, 338 

 prevalence of pathogenic, 338 

 reduction of nitrates, 335 



sulphates, 335 

 septic tank for, 342 

 streptococci in water, 313, 330 

 tanks, 342 

 Sexual changes, 34 

 Sheath of higher bacteria, 108 

 spirochaetes, 108 

 trichobacteria, 109 

 Sheeppox, 857 

 Shell-fish poisoning, 586 

 Shoyu preparation, aspergillus in, 56 

 Side chain theory of immunity, 722 

 Signatera, 585 

 Silage, 574 



B. botulinus in, 576 

 fermentation of, 575 

 Silkworm, B. sotto in, 945 



pebrine of, 937 

 Skin, protection by, 688 

 Sleeping sickness, 882 

 Slimy milk, 464 



Slimy wine, 610 

 Smallpox, 854 



vaccine, 727 



Snow, microorganisms in, 317 

 Sodium chloride as preservative, 554 

 Soil, acidity, 355 



causes of, 355 



change in, produced by organ- 

 isms, 357 



number of organisms, influ- 

 enced by, 357 

 range of, 355 



species, influenced by, 357 

 aeration, 350 

 aerobic activities, 350 

 algae in, 364 

 aluminum in, 425 

 ammonia formation, 387 



transformation, 398 

 ammonification, 383 



climatic conditions influencing, 



384 

 efficiency, 388 



of different species, 387 

 experimental study, 383 

 mechanism of, 384 

 molds, 361 



numbers involved, 385 

 species involved, 385 

 anaerobic activities, 350 

 antagonism in, 426 

 bacteria, 367 



aerobic species, 402 

 anaerobic species, 402 

 counting, methods of, 370 

 at different depths, 368 

 distribution, 368 

 groups(morphological and physio 



logical), 369, 370 

 methods of study (quantitative 



and qualitative), 371, 372 

 nitric, 390 

 nitrous, 390 

 number, 367 

 productive soil, 367 

 sulphur, 422 



