INDEX 



295 



Transportation of disease germs, 



220. 

 Traps, 247. 

 Trichina, 145. 

 Trichophyton, 53. 

 Tuberculosis, 212, 222, 227, 232, 235, 



238. 239, 244, 252, 253. 

 Typhoid fever, 102, 212, 220, 221, 



222, 227, 238, 244, 253. 



Unfermented grape juice, 70. 

 Unleavened bread, 73. 

 Utility of molds, 51. 



Vaccination, 249. 



Vacuoles, 60. 



Vacuum cleaners, I20. 



Vegetables, drying of, 146; preser- 

 vation of, 155. 



Vinegar, 6, 72, T31, igS ; as a pre- 

 servative, 165 ; eels, 134. 



Water, as a distributer of disease, 



222 i bacteria in, 115. 

 Wells, a source of infection, 222 ; 



for preserving food, 1 55. 



Wholesomeness of bacterial prod- 

 ucts, 197. 



Whooping cough, 212, 213, 219, 232, 

 239, 242. 



Wild yeasts, 58, 63, 65, 70. 



Wines, homemade, 7 1 ; method of 

 making, 70 ; sparkling, 96. 



Wood, decaying of, 51. 



Wounds, treatment of, 238. 



Wuk, 67. 



Yeast, as a cause of bitter milk, 68 ; 

 as an enemy, 68 ; as a friend, 6g ; 

 brews, 83 ; cultivated, 76; different 

 kinds of, 77 ; discovery of, 50 ; 

 distribution of, 63 ; food of, 66 ; 

 growing state of, 60 ; in bread 

 making, 74 ; method of obtaining, 

 75 ; powder, 82 ; preparations, 

 79 ; selection of best species of, 

 78 ; species of, 61 ; structure of, 

 59 ; used as a source of alcohol, 

 69 ; as a source of carbon dioxide, 

 72 ; waste as a food, 67. 



Yellow fever, 214, 219. 



