232 Index 



PAGE 



Water " . 184 



' bacteria in ..... 184 



bacterial analysis of . . . . . . . I9o 



' boiling of IQI 



1 filtration of l88> IQI 



polluted IOS , 185, 192 



' self -purification of .189 



' sewage in l87 



' supplies I86> IQ3 



' typhoid bacilli in 105, 1 86 



Wells, dangers of ..... 193 



construction of . . . . . . . . .194 



Whooping cough . . . . . . . . , t i^ Q 



Wine, bacteria in 4S 



Wound diseases .......... 70 



Wounds, healing of . . . . . . . .78 



Yeast in alcohol making ........ 45 



Yellow fever .......... 138 



