Steam at air pressure, 134 sterilizers, 135 streaming, 135 under pressure, 136 _Stegomyia_, 242 Sterile, 131 Sterilization, 130 in canning, 133 discontinuous, 133 by filtration, 21, 152 first experiment by boiling (moist heat), 20 by chemicals, 21 by dry heat (hot air), 21 by filtration, 21 Sterilizers, pressure, 137 steam, 135 Stimuli, chemical, 257, 258, 259 Stock cars, 170 solutions, 205 vaccines, 285 Stomach, 246 Straight needles, 192 Stratiform liquefaction, 222 Strawberry poisoning, 292 Streak methods of isolation, 196 plates, 188 Streptobacillus, 53, 56 Streptococcus, 56, 60, 245 _Streptococcus_, 60, 62, 66, 68, 69 Streptospirillum, 55 Streptothrix, 38 _Streptothrix bovis_, 30, 36 Strict aërobe, 76 anaërobe, 76 parasite, 87 Structures, accidental, 43 cell, 41 essential, 41 Subcutaneous inoculation, 227 Subdural inoculation, 228 Substrate, 123 Successive existence, 103 Sugar broth, 176, 177 Sulphate reduction, 114 Sulphur bacteria, 63, 86, 115 deposits, 116 function of, 89 in proteins, 105 Summary in immunity, 295 Ehrlich’s theory, 259 Sunning, 148 Surface reactions, 91, 92 Surgical instruments, 167 Susceptibility, 235 Swine, 227 Symbionts, 87, 103 Symbiosis, 87 Synthetic media, 172, 183 Syphilitic antigen, 277, 279 Syphilis, 233, 245, 248, 249 Wassermann test, 277, 279 T TABULATION of antigens and antibodies, 294 _Tænia solium_, 28, 35 Tapeworm, 28, 35, 232 Taxes, 203 Temperature conditions, 74 effect on growth, 213 factor in immunity, 251 room, 213 Test, complement deviation, 277 fixation, 276, 279 dose, 264 for enzymes, 123 Gruber-Widal, 268 mallein, 292 negative, 278 positive, 278 for toxins, 127 tuberculin, 292 Wassermann, 277, 279 Widal, 268 Testicle, 249 Tetanus, 231, 238, 243, 249, 251, 252 antitoxin, 252 toxin, 126 Tetracoccus, 57 Tetrad, 57 Texas fever, 232, 233, 242 THAER, 31 Theories of immunity, 256 Theory, anaphylaxis (author’s), 290-292 cellular, 256 chemical, 256 contagious disease, 34 contagium vivum, 25, 28, 33 Ehrlich’s, 256-260 exhaustion, 256 germ, 25 living cause, 33 mosquito, 25 noxious retention, 256 overproduction, 257, 258 phagocytosis, 256 side-chain, 256 spontaneous generation, 17 unfavorable environment, 256 Thermal death point, 75, 215 Thermophil bacteria, 75, 77 Thermoregulator, 213 Thermostat, 213 THIOBACTERIA, 63 _Thiothrix_, 63 Thread, 56 Thrombin, 124 Thrush, 27, 34, 244 Ticks, 241 TIEDEMANN, 26 Tinea, 28 Tissue contrast stains, 205 Titer, 268 Titration, 174 Tonsil, 245, 249 Tonsillitis, 245 TOUISSANT, 283