INDEX OF SUBJECTS. 721 



Purification of water, by chemicals, 208 Serum, antidysenteric, 485 

 heat, 208 antigonococcic, 485 



ozone, 207 antimicrobial, 484 



Putrescin, 115 antirabic, 485 



antistreptococcic, 484 

 RABIES, serum for, 485 Dorset-Miles, 484 



vaccine, 473 Sewage, anaerobic organisms, 213 

 Radium rays, 165 fermentation of, 214 



Ragi, 447 cellulose, 215 



Rain, microorganisms in, 198 fats, 216 



Rate of oxidation, 231, 244 proteins, 214 



carbon in soil, 231, 244 urea, 214 



hydrogen, 231 niters, 223 



nitrogen in soil, 231, 244 microorganisms of, 212 



Reaction of soil, 235 cultivation of, 222 



Reduction of, nitrates, 96, 1 18, 217, 264 destruction by biological pro 



nitrites, 218, 264 cesses, 224 



sulphate, 96, 119, 217, 289 by chemical processes, 225 



Refrigeration, 158, 395 life in filters of, 221 



after-storage changes, 397 longevity of pathogenic organism 



of butter, 400 in, 220 



chilling changes, 395 oxidizing bacteria of, 218 



of eggs, 399 pathogenic bacteria in, 220 



of fish, 397 prevalence of pathogenic, 220 



of food-stuffs, 395 reduction of nitrates, 218 



of fruits, 400 nitrites, 218 



legal control of, 401 sulphates, 217 



of meat, 397 septic tank for, 224 



of milk, 400 streptococcic in water, 194, 204 



of poultry, 397 tanks, 224 



storage changes, 396 Side-chain theory of immunity, 574 



of vegetables, 400 Skatol, 114 



Resistance of spores, 160 Skin, 545 



Retting, 465 Slimy milk, 325 



Rice beer, 443 Smallpox, vaccine, 470 



Ripening of milk, 350 Snow, microorganisms in, 119 



Rivers, microorganisms in, 200 Soil, acidity, 235 

 Ropy milk, 325 causes of, 236 



Rotation of elements 1 27 number of organisms, influenced 



by, 236 



SAKE, 107, 443 range of, 235 



Sand filter, 205, 222 species, influenced by, 236 



life in, 221 aeration, 230 



Saprophytes, 76 aerobic activities, 231 



cosmopolitan, 16 algae in, 239 



facultative, 521 aluminum in, 291 



obligate, 17, 76, 521 ammonia formation, 254 



Sauerkraut, 462 transformation, 266 



Schizogony, 73 ammonification, 253 



Sclerotium, 13 climatic conditions influencing, 



Seasonal influence on soil, 232 254 



Sea water, microorganisms in, 201 efficiency of different species, 256 



Sedimentation, influence on germ content experimental study, 253 



of water, 202 mechanism of, 254 



Septic tank, 224 numbers involved, 256 



Septum, 12 species involved, 256 



Serum, antidiphtheritic, 480 anaerobic activities, 231 



46 



