i68 
HOUSEHOLD BACTERIOLOGY 
Leavened bread, 6 
Leucocytes, 88 
Life, spontaneous generation 
of, 109 
work of dust plants, 63 
Liquefying bacteria, 74 
Lockjaw, cause of, 80 
Making antitoxin, 95 
Meadow tea, no 
Metchnikoff’s theory, 93 
Meteoric dust, 3 
Method of infection, 78 
of study of bacteria, 112 
Microbe, definition of, 16 
Micro-organisms, 16 
Microscope, compound, no 
Mildew, 6, 37 
Milk, bacteria in, 14 
clean, 14 
Pasteurized, 67 
souring of, 13 
Mold, reproduction of, 33 
spores, 35 
Molds, 6, 33, 39, 59 
in ripening cheese, 59 
work of, 36 
Moldy houses, 38 
Movement of bacteria, 26 
Movements of dust, 4 
Mustiness, 37 
Natural home of bacteria, 30 
immunity, 93 
Nature of disease, 131 
Nature’s disinfectants, 96 
Necessity of dust, 2 
Newman’s theory, 93 
Nitrifying bacteria, 51 
Nitrogen traps, 52 
Nutrient media for dust-gar¬ 
dens, 13 
Opposition to vaccination, 147 
Ordinary dust, 5, 13 
Origin of disease germs, 77 
Oxygen, relations of bacteria 
to, 24 
Oysters, infection by, 82 
Pasteur’s theory, 95 
work of, hi, 148 
Pasteurization, 66, 115 
Pasteurized milk, 67 
Pathogenic germs, 66 
Personal responsibility for 
sanitation, 108 
Petri dish, 7 
Phagocytes, 88 
Photograph of dust-gardens, 
1, 12, 99, 103, 105 
Planting dust-gardens, 10 
Plants, bacteria classed as, 112 
Plumbing, care of, 106 
Poisoning, blood, 91 
effects of, 92 
Polluting water, 83 
Porcelain filters, 84 
Precautions to avoid germ in¬ 
fection, 79 
Preparing soil for dust-gar¬ 
dens, 9 
Preservatives, 72 
Preserving food, 68 
