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, 33 8 



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 

 spirochsetes, 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 



