346 



INDEX 



Immunity, 240-263 



— acquired, 247, 250 



— active, 250 



— artificial, 250 



— natural, 250 



— passive, 250 

 Incubation period, 271 

 Incubators, 22 

 Indol, formation of, 61 



— testing for, 61 

 Industries and bacteria, 135 

 Influenza, 315 

 Intracellular poisons, 34 

 Inversive ferments, 115 

 Involution forms, 12, 66 



Kipp's apparatus for producing hydro- 

 gen, 27, 139 

 Klebs-Loffler bacillus, 289 

 Koch's plate method, 40 



— postulates, 266 



— comma bacillus, 66 



— bacillus of tubercle, 276 



Lactic acid fermentation, 115, 130, 



1S5, 190, 221, 226 

 Lactose, 190 

 Leguminosse, fixation of nitrogen by, 



163 

 Leprosy, 30S-313 

 Leptothrix, 8, 33 

 Leuconostoc, 17 

 Light, influence upon bacteria, 24-26, 



70 

 Liquefaction of gelatine, 44, 241 

 Low yeasts, 125 

 Lymph, glycerinated calf, 252 

 Lyon's, Washington, disinfector, 328 



Maceration industries, 135 

 Malaria, 177, 320 

 Malignant oedema, 19, 172 

 Mallein, 319 

 Mastitis, 184 

 Measles, 321 

 Meat, 234 

 Media, culture, 20 

 Merismopedia, 11 

 Method of examination, 43-47 

 Metropolitan water supply. 72 

 Miasmatic diseases, 176 

 Micrococcus, definition of, 8 



— agilis, 16 



— aquatilis, 53 



— case! amari, 226 



Micrococcus Freudenreichii, 192 



— gonorrhoeae, 299 



— tetragonus, 299 



— viscosus, 192 



Milk, bacteriology of, 178-213 



— absorptivity of, 180 



— sources of pollution, 181-184 



— number of bacteria in, 185 



- — influence of temperature upon, 186 



— influence of time of standing, 187 



— fermentation bacteria in, 189 



— constitution of, 189-195 



— disease-producing powder of, 195 



— and tuberculosis, 197-199, 228, 290 



— and typhoid, 199 



— and cholera, 200 



— and diphtheria, 201 



— and scarlet iever, 202 



— and t+irush, 203 



— methods of preservation of, 205 



— and added antiseptics, 205, 206 



— filtration of, 206 



— sterilisation of, 207 



— pasteurisation of, 208-213 



— products, bacteria in, 213-227 



— examination of, 227 



— and economic bacteria, 215-220 



— sterile, 181 



— kinds of bacteria in, 188 



— chromogenic, 193 



— cooling processes, 207, 209 

 Moist chamber. 41 



Moisture necessary for bacteria, 23 

 Motility, 14 

 Moulds, 116 

 Mycoderma aceti, 127 



Nasal passages, bacteria in, 103 

 Natural purification of water, 69 

 Needles, platinum, 22, 24 

 Nitrates, 147, 154 

 Nitric organism, 157, 158 

 Nitrification, 76, 143-159 



— chemistry of, 144-148 



— stages in, 145 



— bacteria of, 152 



Nitrifying organisms, cultivation of, 



156 

 Nitrogen, fixation of, 144. i6o-i68 

 Nitrous organism, 154, 158 

 Nodules on roots, bacteria in, 163 



Oidium albicans, 203 



Oxygen necessary for bacteria, 26 



Oysters and bacteria, 229-234 



