870 



INDEX OF SUBJECTS 



Aspidisca, 336 



Associative action of bacteria in the 



reduction of nitrate, 186 

 Associative growth of legumes and 



non-legumes, 599 

 Assulina, 332 

 Astasia, 334 



Aslerocystis radicis, 278, 808 

 Atmosphere of soil, 638 

 Atmospheric nitrogen, fixation of, 



103 

 Aulosira, 227 



Autocatalytic reaction in the growth 

 of microorganisms, 320, 373-376, 

 527 

 Autochtonous microflora of soil, 10, 151 

 Autotrophic bacteria, in soil, 4, 59, 

 61-102, 369 

 classification of, 388 

 Autotrophic protozoa, 315, 316 

 Auximones, 5S0, 699 

 Azolobacter, 59, 105, 106, 110, 111, 

 112-122, 138, 164, 447, 559, 560, 

 563, 564, 565, 575, 579, 581, 594, 

 623, 630, 637, 641, 642, 656, 662, 

 699, 708, 779, 828 

 agile, 105, 114, 117, 118, 572 

 beijerinckii, 115, 117, 118, 582 

 chroococcum, 105, 107, 112, 114, 116, 

 117, 118, 119, 155, 183, 441, 562, 

 566, 567, 572, 575, 578, 579, 582, 

 654, 694, 762 

 vinelandii, 115, 116, 117, 118, 572, 



582 

 vilreum, 115, 117 

 Azolobacter, as food for amoebae, 319 

 composition of, 381, 570, 571 

 energy utilization by, 419, 561, 569 

 fixation of nitrogen by, in presence 



of protozoa, 338 

 life cycles of, 117 

 nitrogen-fixation by, 560, 567 

 numbers of, in soil, 37 

 occurrence in soil, 10, 11, 117 

 physiology of, 119 

 protein synthesis by, 570 

 species, description of, 114 



B 



Bacillariaceae, 215, 225 

 Bacillariales, 227, 230 

 Bacilli in soil, 11 

 Bacillus, 58 



aceloethylicum, 467 



adhaerens, 144 



aerogenes capsulatus, 173 



agri, 144, 150 



albolactus, 144 



alvei, 146 



amylobacter, 37, 59, 104, 106, 107, 

 110, 146, 161, 162, 164, 167, 172, 

 173, 175, 178, 191, 203, 204, 447, 

 462, 549, 558, 579, 582, 623, 630, 

 637, 641, 646, 708, 779, 828 (see also 

 Clostridium pastorianum) 



amylocyme, 172 



anthracis, 146, 803, 805 



arborescens, 490, 762 



asterosporus, 105, 120, 144, 146, 149, 

 162, 203, 383, 558 



alerrimus, 143 



azophile, 121 



bifermentans, 174, 492 



botulinus, 174, 803, 806 



brevis, 145, 150 



butyricus, 172, 762 



calf actor, 157, 441, 775 



capri, 146, 213 



carotarum, 146, 149, 214 



carolovorus, 203, 461 



cellulosae dissolvens, 173, 194, 203 



centrosporus, 145 



cereus, 10, 27, 142, 144, 145, 149, 150, 

 382, 444, 462, 491, 500, 642 



cereus, var. fluoresceins, 144, 150 



chauvoei, 161, 174, 805 



circulans, 145 



cobayae, 146, 213 



cohaereus, 144, 146, 149, 150 



comesii, 203 



danicus, 120 



ellenbachensis, 104, 144, 146, 149, 833 



enteritidis sporogenes, 173 



felsineus, 173, 178, 203, 204 



