INDEX OF SUBJECTS 



727 



Bacteria, enzymes produced by, in- 

 verting, 169 

 proteolytic, 168 

 gas formation by, 164 

 See also Gas formed by bacteria 

 Grain-negative, 104 ~ 

 Gram-positive, 104 

 in air. See Air, bacteria in 

 in industries, 715 

 in milk. See Milk, bacteria in 

 in soil. See Soil, bacteria in 

 in tissues, staining of, 110 

 in water. See Water, bacteria in 

 incubation of, 156. 

 See also Incubation of cultures 

 indol production by, 167 

 invasive power of, 294 

 isolation of, methods of, 142 



from milk, 710 

 katabolic activities of, 41-53 



by bacterial enzymes or ferments, 42 



varieties of, 48 

 by denitrifying bacteria, 52 

 by fat-splitting enzymes, 47 

 by lab enzymes, 46 

 by proteolytic enzymes, 43 

 liberation of energy by, 58 

 light production of, 59 

 microscopic study of. See Microscopic 



study 



nitrifying. See Nitrifying bacteria- 

 nutrition of, 25 

 See also Nutrition of bacteria 

 occurrence of, in the body, 181 

 parasitic, 29 



definition of, 182 

 pathogenic, 182 

 phenol production by, 167 

 physical agents injurious to, 62 

 pigment formation by, 59 

 protozoa and, differentiation of, 1 

 putrefactive, quantitative chemical 



analysis of, 21 

 reducing powers of, 167 

 relation of, to moisture, 34 

 to physical environment, 31 

 to pressure, 34 

 to temperature, 31 



Bacteria, relationship of, to other plants, 



35 



reproduction of, 18 

 rate of, 18 

 varieties of, 18 

 saprophytic, 29 



definition of, 182 

 size of, 9 

 staining of, methods of. See Staining 



of bacteria 



sulphur. See Sulphur bacteria 

 symbiosis of, 30, 31 

 thermal death points of, 33 

 variations in forms of, 19 

 virulence of, and infectiousness, 183 

 virulent, sublethal doses of, in active 



immunization, 195 

 Bacteriaceae, 37 

 Bacterial cell, ash in, 23 

 Babes-Ernst granules in, 11 

 capsule of, 12 

 carbohydrates in, 23 

 chemical constituents of, 21 

 quantitative analysis of, 21 

 varieties of, 21 

 fats in, 22 

 globulin in, 22 

 membrane of, 12 

 metachromatic granules in, 11 

 morphology of, 100 

 motility of, 13 

 Brownian, 14 

 by flagella, 14 

 effect of temperature on, 15 

 molecular, 14 

 true, 14 

 nucleus in, 10 

 organs of locomotion of, 13 



classification of bacteria based on, 15 

 osmotic properties of, 23 

 permeability of membrane of, 23 

 plasmolysis of, 23 

 plasmoptysis of, 24 

 polar bodies in, 11 

 proteids in, 22 



refractive index of parts of, 24 

 specific gravity of forms of, 24 

 water in, 21 



