170 
HOUSEHOLD BACTERIOLOGY 
Terms, summary of, 114 
Tetanus, 80 
Theories of vital resistance, 
88 
Time for dusting, 100 
Toxins, 93 
Typhoid, epidemic of, 81 
infection by milk, 81 
Useful bacteria, 47 
Vaccination, 94, 145 
opposition to, 147 
Vinegar, 60 
Vital resistance, theories of, 87 
Wandering cells, 88 
Washing dusters, 104 
Waste of nitrogen, 51 
Water, filtered, 85 
polluting of, 83 
Work of bacteria, 47-54 
of leucocytes, 88 
of molds, 36 
of Pasteur, 111 
Yeast, 39 
compressed, 44 
generating carbon dioxide, 
43 
Yeasts, effect of cold on, 42 
experiments with, 42 
Zooglea, 22 
