INDEX 



169 



Prevalence of dust, i 

 Product&fn of lactic acid, 14 

 Products of fermentation, 115 



of yeast growth, 40 

 Protoplasm, 17 

 Pus, formation of, 90 

 Putrefaction, 12 



Rabies, 148 



Refrigerator, care of, 29 

 Relations of bacteria to oxy- 

 gen, 24 



Removing dust, 104 

 Reproduction of bacteria, 20 



of mold, 33 



Resistance of body to germs, 

 86 



of spores, 28 

 Ripening cheese, 58 

 Roquefort cheese, 59 

 Rotation of crops, 53 

 Rules for dusting, 104 



Safeguards of the body against 



disease, 127-151 

 Salt as a preservative, 72 

 Sanitary cleanness, 108 

 Sanitation, 96-108 



personal responsibility for, 



108 



Scavengers, bacteria as, 48 

 School rooms, cleaning, 107 

 Secretions of bacteria, 31 

 Settling of bacteria and molds, 



98 



Sewage contamination, 82 

 Shape of bacteria, 17 



Size of bacteria, 23 



of yeast, 39 



Soil for dust-gardens, 8, 13 

 Soiled articles, disinfect, 79 

 Solid cultures, 1 1 1 

 Source of dust, 3 

 Sources of infection, 86 

 Souring of milk, 13 

 Specific germs of diseases, 76 

 Spoiling, 71 

 Spontaneous generation of 



life, 109 

 Spores, 116 



mold, 35 



of bacteria, 27 



of yeast, 39 



resistance of, 28 

 Starters, 57 

 Sterilization, 115 



intermittent, 65, 116 

 Structure of bacteria, 17 



of yeast, 39 

 Sugar as a preservative, 70 



changed to acetic acid, 61 

 Summary, 113 



of terms, 114 

 Sunlight, effect on disease 



germs., 26 



Sunshine as a disinfectant, 25 

 Sweeping, 97 



dust-gardens planted after, 



98- 



Sweepings, burning, 104 

 Symptoms of poisoning, 92 



Temperature for yeast growth , 



