i66 



HO USE ff OLD BA CTERIOL OGY 



Cause of lockjaw, 80 

 Cheese, 59 



molds in ripening, 59 

 Cider vinegar, 60 

 Clean eggs, 73 

 Clean milk, 14 

 Cleaning school rooms, 107 

 Cleanness, sanitary, 108 

 Clothing, brushing, 106 

 Colonies of bacteria, 12 



of dust plants, 10, 15, 16 

 Color of mold spores, 38 

 Common methods of preserv- 

 ing food, 68 



Communicable diseases, 75 

 Compound microscope, no 

 Compressed yeast, 43 

 Contamination, sewage, 82 

 Covering food, 104 

 Criminal carelessness, 83 

 Crops, rotation of, 53 

 Cultures, solid, in 



Deadly dish-cloths, 106 

 Deaths from lockjaw, 80 

 Decay, 115 

 Diphtheria antitoxin, 95 



bacillus, 135 

 Disinfectants, 65 



nature's, 98 



Disinfectant, sunshine as a, 25 

 Disinfect soiled articles, 79 

 Disease, care of discharges in, 



79 



from molds, 36 

 germs, 75-86 

 germs, effect of light on, 83 



germs, identifying, 113 



germs, origin of, 77 



nature of, 131 



producing bacteria, 132 

 Diseases communicable, 75 



infections, 133 



specific germs of, 76 

 Drying food, 70 

 Dust, 1-7 



movements of, 4 



ordinary, 5, 13 



particles, bacteria on, 97 



plants, 15 



plants in refrigerator 28 



plants, life work of, 63 



sources of danger, 114 

 Dusters, washing, 104 

 Dust-garden out of doors, 73 



plot, the, 7 

 Dust-gardens, 7-14 



photographs of, 1,12, 99, 

 !3. 105 



planted after sweeping, 98 



soil for, 13 

 Dusting, rules for, 104 



time for, 100 

 Dust-proof room, 2 



Effect of antitoxin on the body, 



140 



of cold on bacteria, 90 

 of gastric juices on bacteria, 



87 



of light on disease germs, 83 

 of poisoning, 92 

 of sunlight on disease germs, 



26 



