-- and school influence, 294, 295 -- pseudo-bacillus of, 296 Diplococcus, definition of, 8 Diplococcus of gonorrhœa, 300 -- in pneumonia, 313 Directions for estimating disinfectants, etc., 324 Disease, production of, 264 Diseases of beer, 134 -- of plants, 35 -- of animals, 316-320 -- conveyed by water, 81 -- and soil, 173-177 Disinfectants, 322, 331 Disinfection, 322-336 -- of a room, 335 -- of walls, 335 -- of bedding, 335 -- of garments, 335 -- of excreta, 335 -- of wounds, 336 -- of hands, 336 Domestic purification of water, 79 Dunham's solution, 69 Dysentery, 319 Earth temperatures and disease, 175 Economic bacteria, 145 Egg cultures, 340 Elsner's medium, 62 Endospores, 17 Enteric fever, _see_ Typhoid Enzymes, 114 Equifex disinfector, 328 -- sprayer, 334 Erysipelas, 299 Examination, bacteriological-- -- air, 96-99 -- cholera, 68 -- diphtheria, 290, 340 -- leprosy, 309 -- meat, 234 -- milk, 227 -- sewage, 80 -- soil, 138 -- tetanus, 170 -- tubercle, 276, 339 -- water, 43-48 -- yeasts, 119, _et seq._ Extracellular poisons, 244, 273 Fermentation, 111-136 -- acetous, 115, 127 -- alcoholic, 115, 117 -- ammoniacal, 115, _see_ under Soil -- butyric, 115, 132, 191 -- lactic acid, 115, 130, 190 Ferments, organised, 114, 115 Ferments, unorganised, 114, 115 -- chromogenic, 193 -- curdling, 191 -- bitter, 191 -- slimy, 192 -- soapy, 193 Films, 123 Filter, domestic, 79 Filter-beds, 74 Filtration, milk, 206 -- method of air examination, 99 -- sand, 77-79 Fission, 16 Fixing specimens, 45 Flagella, 15 -- staining, 63 Food, bacteria in, 179, 180 Foot-and-mouth disease, 320 Formaldehyde and formalin, 205, 206, 333 Forms of bacteria, 8 Fränkel's tube, 140 -- pneumococcus, 314 Friedländer's pneumo-bacillus, 315 Gas, production of, 62, 241 Gathering-ground, 38 Gelatine, 21 -- carbol, 62 -- liquefaction of, 44 Gemmation, 119 Gentian-violet, aniline, 44 Germicidal temperatures, 30, 207 Germicides, 322, 331 Glanders, 319 Gonorrhœa, 300 Gram's method, 44, 338 Gravity, influence on bacteria, 106 Gypsum block, 121 Hæmatozoa, 320 Hanging drop cultivations, 44 Hansen's method of dilution, 123 Heat as steriliser, 30, 326 Heredity, 268, 269 Hesse's method of air examination, 98 Higher bacteria, 11 High yeasts, 125 Hot air steriliser, 31 Hydrogen cultivation, 139 Hydrophobia, treatment of, 253 Ice-cream, bacteria in, 236-238 -- examination of, 236 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