228 Index 



PAGE 



Ice, self-purification of . . . . . . . . . 197 



Immunity 157 



" acquired . . . . . . . . .157 



" active ......... 163 



forms of . . . . . . . .171 



natural . 157 



nature of . 159 



passive . 163 



to poisons . . . . . . . . .158 



Infection, reduction of risks of . . . . . .177 



sources of . . . . . . .175 



prevention of . . . . . . . .178 



and nostrum mongers , . . . . . .183 



Infectious disease . .67 



food 179 



material, disposal of ....... 208 



Inflammation .......... 76 



Influenza . . . . . . . . . . .119 



Kissing, risks of . . . . . . . . . .89 



Koch 36, 83 



Leucocytes .......... 77, 79, 146 



as heroes ......... 152 



extracts of 168 



Life, nature of . . . . . . . . 3, 62 



Lockjaw 127 



Lungs, cavities in 85 



" dust ......... 200, 201 



tubercles in 84 



Lymph-glands .......... 147 



Lymph-nodes .......... 147 



" dust in ......... 201 



Lytic substances . . . . . . . . .166 



Malaria 137, i?i. i?8 



Man, development of ......... 9 



Manure, bacteria in' . . . . . . . . 24, 56 



Measles I3S 



Meat 93, 181 



Meningitis 131 



antitoxin 163 



Meningococcus . . . . . . . . . .131 



