ological, 470
quantitative bacteriological, 468
of butter, qualitative bacteriological, 458
quantitative bacteriological, 457
of cream, qualitative bacteriological, 458
quantitative bacteriological, 457
of fish, 460
of ice cream, qualitative bacteriological, 457
of meat, apparatus for, 460
method of, 460
qualitative bacteriological, 462
of milk, apparatus for, 444
collection of samples, 441
method of, 441
qualitative bacteriological, 446.
quantitative bacteriological, 444
of oysters, 463
of sewage, qualitative bacteriological, 467
quantitative bacteriological, 466
of shellfish, 463
of soil, apparatus for, 473
collection of samples, 471
method of, 470
qualitative bacteriological, 476
quantitative bacteriological, 473
of water, apparatus for, 420, 427
collection of samples, 416
method of, 416
qualitative bacteriological, 426

Analysis of water, quantitative bacteriological, 420

Aniline dyes, 83
Gentian violet, 95
water, to prepare, 108

Animal tissue media (Frugoni), 210

Animals, natural infections of, 337

Antiformin method for B. tuberculosis, 502

Antigen, definition of, 324

Antiseptics, 27
action of, 310

Apparent filth in milk, 450

Arnold's steam steriliser, 34

Arthrogenous spores, 138

Ascitic bouillon, 210
fluid agar (Wassermann), 213

Ascomycetae, 128

Ascopores, 129

Asparagin Media (Frankel and Voges), 183
(Uschinsky), 183

Aspergillus, 127

Atmospheric conditions, 295

Attenuating the virulence of organisms, 321

Autoclave, 37
to use, 37

Automatic pipettes, 13

Autopsies, 396

Autopsy, card index for, 402

Bacilli, morphology of, 132

Bacillus anthracis in soil, 477
in water, 440
coli in water, detection of, 429
diphtheriae in milk, 452
enteritidis in water, 437
sporogenes in milk, 452
in water, 438
oedematis maligni in soil, 477
tetani in soil, 477
in water, 441
tuberculosis in milk, 453
antiformin method, 502
typhosus in water, 441

Bacteria, anatomy of, 134
classification of, 131
grouping of, for study, 410
in tissues, demonstration of, 114
influence of environment on, 142
metabolic products of, 143
methods of identification, 259
microscopical examination of, stained, 81
unstained, 74
physiology of, 136

Bacteria, simple stains for, 90

Bacterial emulsion, preparation of, 389
enzymes