232 



INDEX 



Cellulose, fermentation, 182-189 

 Cellulose, ferments discovery of, 



185-186 

 Cellulose, fermentation early work 



on, 184, 185 

 Cellulose, fermentation, function 



of, 187-189 

 Cellulose, fermentation, products 



of, 186, 187 

 Cellulose, function of in soil, 



183, 184 

 Cellulose, in soil, 183, 184 

 Chemotaxis, 70 

 Chemistry of bacteria, 42-52 

 Chloroform, influence on bacteria, 



120 

 Classification, of bacteria, 36-41 

 Classification, difficulties of, 37 

 Classification, methods of, 36 

 Classification, Megula's, 38 

 Classification, nomenclature of, 37 

 Classification, S. A. B'S, 39-41 

 Clostridium, 33 



Clostridium, pasteurianium, 141 

 Cocci, 23 



Cold, influence on bacteria, 64 

 Cold, influence on soil bacteria, 



93 



Color of soil, influence on tem- 

 perature, 109 



Copper, in soil, 206 



Conn, 6 



Corn, influence on nitrification, 



Co!;! p,.,. « ., . 



Crooks, William, 99 



Crop, influence on nitrification, 



127 



Crop, influence on nitrogen fixa- 

 tion, 146 

 Cultivation of bacteria, 42 

 Cycle of elements, 97-106 

 Cycle of elements, importance of 

 bacteria in, 97 



D 



Decay, 1 1 



Denitrification, 132-137 

 Denitrification, bacteria causing, 



96, lOI 

 Denitrification, bacteria in soil, 



133 



Denitrification, defined, 132 



Denitrification, factors influenc- 

 ing, I35j 136 



Denitrification, function of, 136 



Denitrification, loss of nitrogen 

 due to, 135 



Diphtheria, toxin, 47 



Disinfectant, 69 



Dusch, 6 



T? 



XL/ 



Earth's crust, composition of, 90 

 Electricity, effect on bacteria, 67 

 Elements, required by plants, 



171, 172 

 Emulsions, disinfecting powers of, 



69 

 Energy, source of to azotobacter, 



144, 145 

 Enzymes, 49 



Fallow, influence on nitrification, 

 127, 128 



