INDEX OF SUBJECTS. 



ACCUMULATION of organic acids 



in soil, 250 



Acid producing bacteria in milk, 306 

 Acidity of soil, 235 



causes of, 236 



influence of, 236 



range of, 235 

 Aeration, of milk, 316 



of soil, 230 

 Aerobes, 94, 270 

 Aerobic activities in soil, 231 

 Agglutination, stages of, 570 



tests, 488 

 Agglutinins, 567 



co-, 567 



distribntion in blood, 568 



inherited, 568 



normal, 567 



production of, 567 



structure of, 569 



substances concerned in, 568 



suspensions for, 488 



tests for, 488 

 Agglutinogen, 569 

 Agglutinoids, 570 

 Agitation, influence of, 170 

 Air, 185 



carrier of contagion, 190 



contamination of milk, 301 



determination of microorganisms in, 



, I8 7 



disease organisms in, 190 



entrance of microorganisms into, 186 



fermentation organisms in, 191 



freeing from bacteria, 191 



kinds of microorganisms in, 189 



in milk-house, 301 



number of microorganisms in, 188 



occurrence of microorganisms in, 186 



of stable, 301, 302 



subsidence of microorganisms in, 187 

 Air-borne infection, 190, 525 

 Alcohol, distilled, 443 



enzymes of, 141, 445 



fermentation of 109, 418 



in milk, 326 



raw materials of, 444, 445 



Alcohol, sources of, 444 

 Algae in soil, 239 

 Aluminum in soil, 291 

 Amboceptor, 560 

 Amino-ace tic acid, 114, 115 

 Ammonia, mechanism of, 254 



production of, 253 

 Ammonification, climatic conditions, 254 



efficiency of species, 256 



influenced by, 254 



number of species involved, 256 



soil conditions, 254 



species involved, 256 

 Anabolism, 130 



theory of, 144 

 Anaerobes, 94 



facultative, 94 



obligate, 94 

 Anaerobic activities in soil, 231 



tank, 224 

 Analysis of milk 331 



of water, 203 

 Anaphylaxis, 541 

 Animal carriers of disease, 526 

 Antheridium, 14 

 Anthrax, vaccine, 476 

 Antiamboceptors, 562 

 Antiantibodies, 562 

 Antibiosis, 183 

 Antibody formation, 540 

 Antiprecipitin, 572 

 Antiseptics, 173 

 Antitoxin, discussion of, 554 



for diphtheria, 480 



manufacture of, 480, 483 



mechanism, 555 



natural, 549 



neutralization by toxin, 559 



occurrence of, 553 



origin of, 555 



for tetanus, 483 



units of, 482 



Aromatic substances, 121 

 Ascus, 14 



Asiatic cholera, vaccine, 477 

 Autolysis, 141 

 Autoprecipitins, 571 



709 



