320 



BACTERIA, YEASTS, AND MOLDS 



Yeasts, 25, 30, 87-117; as enemies, 

 87; as friends, 88; as source of 

 alcohol, 88; as source of carbon 

 dioxide, 90 ; budding of, 78 ; dif- 

 ferences in fermenting powers of, 

 gS; distribution, 74-86; fermen- 



tation and, 74; in the household, 

 87-117; salt raising and, 93 ; struc- 

 ture of, 77 ; where found, 81 ; wild, 

 76 

 Yellow fever, 239; mosquitoes and, 

 244, 24s 



