s, 292

Orth's carmine, 96

Oxford stain for Actinomyces, 112

Oysters, analysis of, 463

Pakes' counting disc, 424
filter reservoir, 45

Papier chardin, 158

Pappenheim's stain, 111

Paraboloid condenser, 60

Parachromophorous bacteria, 144

Paraffin method for sections, 117
sections, mounting of, 119
to stain, 121

Paratrophic bacteria, 131

Parietti's bouillon, 202
method of isolating coli-typhoid group, 437

Parsnip medium, 200

Passages of virus, 320

Pasteur-Chamberland filter, 42

Pasteur's pipettes, 10
solution, 191

Pathogenesis, investigation of, 315

Pathogenic bacteria, 131
study of, 408

Pediococci, morphology of, 132

Penicillium, 128

Peptone rosolic acid water, 186
water (Dunham), preparation of, 177

Percentage formula, 496

Perchloride of mercury, 27

Perisporaceae, 127

Peritrichous bacilli, 136

Permanent preparations of bacteria, 407
of tissues, 404

Petri's dishes, 6

Phagocytic index, 392

Phenol coefficient, 489
production, test for, 287

Photogenic bacteria, 131, 144

Physiological filter, 156

Picric acid solution, 121
(Spengler's), 112

Picrocarmine, 97

Pigment production, observations on, 288

Pipettes, automatic, 13
blood, 11
capillary, 10
cases for, 7
graduated, 6
capillary, 13
Pasteur's, 10
sedimentation, 16
standard graduated, 7
teat, 10
throttle, 13
to clean infected, 20
new, 18
to sterilise, 31

Piridin method of staining spirochaetes, 124

Pitfield's flagella stain, 103

Plasmolysis, 135

Plaster-of-Paris discs, 192

Plate box, 7
cultures, description of, 261
preparation of, 226
levelling stand, 228

Plates, Petri's, 6
to clean infected, 20
new, 18
to sterilise, 31

Platinum needles, 71
method of mounting, 71

Pleomorphism, 133

Polar germination, 140
granules, 136

Polkoerner, 136

Polychrome blood stains, 97

Pooled serum, 379

Porcelain filter, 42
Berkefeld, 42
Chamberland, 42
Doulton, 42

Post-mortem examination of experimental animals, 396

Potato gelatine (Eisner), 204
(Goadby), 214
medium, preparation of, 174

Potted meat, analysis of, 460

Pouring plates, 227

Preparation of experimental animals, 335

Preservatives in milk, 442

Pressure temperature table, 500

Primary colours, action of, 309

Proteid free broth (Uschinsky), 183

Proteolytic enzymes, tests for, 277