880 



INDEX OF SUBJECTS 



Glucose, influence of, on ammonia 



formation from proteins, 50S 

 influence of, on development of 



microorganisms, 769 

 Glucose agar, 291, 306 

 Glucosides, decomposition of, 466 

 Glucuronic acid, 410 

 Glycerides in soil, 67 

 Glycine, nodule bacteria of, 130, 134, 



137 

 Glycocoll, as asource of energy, 411 



formation from hippuric acid, 212 

 Gunatobotrys, 254 

 Gongrosira, 228 



Gonidia formation by bacteria, 57 

 Gonostomum, 336 

 Gramineae, mycorrhiza formation by, 



274 

 Granulobacter, 95, 105, 106, 109, 119, 



120, 178, 204 

 pectinovorum, 73, 110 

 saccharobutyricum, 172 

 Graphium, 256 



Grass-green algae (see Chlorophyceae) 

 Grass lands, insect fauna in, 356 

 Green manure, influence of, on seed 



germination, 802 

 Greensand-sulfur compost, 661 

 Gromia, 332 

 Gromiidae, 332 



Growth, of microorganisms, 372 

 promoting substances, influence of, 



on nitrogen fixation, 580 

 Grubs in soil, 361 



Grumilea, nodule formation by, 139 

 Guanidin, decomposition of, by bac- 

 teria, 214, 486 

 Guanin, decomposition of, by bacteria, 



214, 486 

 Gum formation by bacteria, 439, 593 

 Gums and their decomposition, 460 

 Gypsum block media, for isolation of 



nitrite-forming bacteria, 71 



H 



Habrotrocha, 351 



Hairy vetch, nodule bacteria of, 136 



Halteria, 336 



Hantzschia, 224, 225, 226 

 Hapalosiphon, 227 

 Harpacticidae, 354, 355 

 Hart marietta hyalina, 330, 331 

 Hay, composition of, 428 



infusion medium, 318 

 Heat as an agent of partial steriliza- 

 tion, 744, 745-749 

 Heat, destruction of fungi by, 244 



formation of, in microbiological 

 processes, 425 

 Heat, of dilution, 387 



of reaction, 387 



of solution, 387 

 Heating of soil, for separation of 

 bacteria, 166 



influence of on biological activities, 

 742 

 Heleopera, 332 

 Heliozoa, 331 

 Helix, 359 

 Helodrillus, 352 

 Hemicelluloses, chemistry of, 452 



decomposition of, by microorganisms, 

 166, 454 

 Helminthosporium, 256, 807 

 Hemiptera, 358 

 Heterodera, 344, 348, 350, 818 



radicicola, 348, 350, 763, 810 



schachtii, 348, 349, 804, 810 

 Heterokontae, 229 

 Heteromita, 330, 333 

 Heteronema, 334 

 Heterotricha, 335 

 Heterotrophic bacteria, 4, 59, 141, 369 



anaerobic, 60 



classification of, 141 



non-spore forming, 150 



spore-forming, 142 

 Heterotrophic protozoa, 315 

 Heterotrophic utilization of energy, 



408 

 Hexamitus, 334 



Hibernation of insects in soil, 359 

 Hippuric acid, 206, 212 



decomposition of, by bacteria, 212, 

 487 

 Histidine in soil, 479, 671 



