690 INDEX. 
Horse, symptoms of glanders in the, 491 
immunization of, against tetanus, 
360 
Horses, bacillus of acne contagiosa of, 
557 
diplococcus of pneumonia in, 418 
streptococcus coryze contagiose of, 
418 
Hot-air oven for sterilizing, 53 
Hot Springs, Ark., Malta fever from the 
tropics at, 420 
Hueppe’s apparatus for sterilizing and 
coagulating blood serum, 58 
classification of bacteria, 12 
Hyacinth, bacterial disease of the, 574 
Hydrant water, number of bacteria in, 
634 
Hydrocele fluid as a culture medium, 40 
Hydrochloric acid, action of, on micro- 
coccus pneumoniz croupose, 
405 
as a decolorizer in staining, 28 
influence of, on bacterial growth, 
181 
Hydrofluoric acid, influence of, on the 
tubercle bacillus, 179 
Hydrogen generator, 86 
in the cultivation of anaérobic bac- 
teria, 82 
influence of, on bacterial growth, 173 
peroxide as a disinfectant, 173 
Hydronaphthol, antiseptic power of, 205 
Hydrophobia, influence of temperature 
on the infectious material of, 156 
protective inoculations against, 332 
toxalbumin of, 327 
Hydrosulpburic acid, a bacterial produc- 
tion, 141 
influence of, on bacterial growth, 
175 
Hydroxylamin, antiseptic power of, 204 
Hypodermic injection of cholera vaccine, 
299 
syringe for inoculations, 97 
Ice, number of bacteria in, 633 
cream, toxic principle in, 148 
Ichthyol, antiseptic power of, 204 
Illicium, antiseptic power of, 203 
Immunity from disease, 233 
Immunity, acquired, 242 
alkalinity of the blood as affecting, 
236 
dependent on antitoxins, 267 
influence of animal temperature on, 
235 
natural agencies by which neutral- 
ized, 240 
theories of, 249 
to anthrax by filtered cultures of the 
bacillus, 428 
by anthrax toxin, 427 
to cholera by a previous attack, 297 
to serpent venom, 262 
to tetanus by cultures in thymus 
bouillon, 359 
inherited, 360 
to tuberculosis by attenuated cul- 
tures, 485 
Immunization of swine against rouget, 
method and disadvantages of, 515 
Impftetanus bacillus, 508 
Incubating ovens, 88 
Indigestion, sarcinz in stomach of per- 
sons suffering from, 662 
Indol, antiseptic power of, 205 
production of, 151 
by the cholera spirillum, 598 
by vibrios resembling the chol- 
era spirillum, 607 
by bacillus septicemiz hzmor- 
rhagicze in peptone solution, 
501 
by bacillus of swine plague, 
Marseilles, 509 
by capsule bacillus of von Dun- 
gern, 562 
not produced by the bacillus of hog 
cholera, 505 
test for the typhoid bacillus, 440 
Infection, rapidity of, 231 
by inhalation, 102 
Infections, mixed, 228 
secondary, 227 
Infectious diseases, chronic, bacilli in, 
467 
Influenza, protective inoculations against, 
335 
bacillus, discovery of, 8 
morphology, 463 
