factors for converting, 493

Meyer's carmine, 96

Microbes of indication, 426

Micrococci, morphology, 132

Micrococcus, melitensis in milk, 456

Micrometer, filar, 66
net, 63
ocular, 63
stage, 62

Micrometry, methods of, 61

Micron, 61

Microscope, 49

Microscopical examination of bacteria, 86
stained, 88
unstained, 86
observations of cultures, 272

Milk, analysis of, qualitative, 446
quantitative, 444
condensed, analysis of, 444
media, 193
preparation of, 172
rice (Eisenberg), 193
(Soyka), 189
samples, collection of, 443
sedimenting tubes, 449

Minimal lethal dose, 316

Mirror for microscope, 55

Moeller's stain for spores, 107

Moist heat, 32

Molecular movement, 79

Monotrichous bacilli, 136

Motility, examination for, 79
true, 80

Moulds, examination of, 126
for paraffin imbedding, 117, 119

Mounting film preparations, 85
paraffin sections, 119

Mouse cages, 342
holder, 351
scales, 341

Mucor mucedo, 126

Mucorinae, 126

Mueller's desiccator, 307

Muffle furnace, 28

Muirs's capsule stain, 100
flagella stain, 101

Museum preparations of bacteria, 407
of tissues, 404
sealing of, 406

Mycelium, 126

Mycoprotein, 135

Naegeli's solution, 191

Naehrstoff agar (Hesse and Niedner), 199

Naked flame, 28

Neisser's stain modified, 111

Net micrometer, 63

Neutral litmus solution, preparation of, 179
red, 94

Nitrate bouillon, 185
peptone solution (Pakes), 186

Nitric organisms in soil, 478

Nitrosoindol reaction, 287

Nitrous organisms in soil, 477

Normal averages (_t.p.r._), 372
serum, 375

Nosepiece, 57
double, 58
triple, 58

Navy's anaerobic method, 244
jars, 245

Nuclei, to stain, 105

Nucleus of bacteria, 135

Numerical aperture, 56

Nutrient media, 146

Nutrose agar (Eyre), preparation of, 172

Object marker, 61

Objectives, 55

Oblique tube cultures, 223

Ocular micrometer, 63

Oculars, 55

Oese, platinum, 71

Oidium, 128

Oil of garlic, 27
of mustard, 27

Oleic acid agar (Fleming), 201

Omeliansky's nutrient fluid, 189

Operation tables (Eyre's), 352
(Tatin's), 351

Opsonic index, 393

Opsonic index, determination of, 390

Opsonin, 387

Optical characters of colonies, 267

Optimum reaction of medium, determination of, 305
temperature, determination of, 298

Organisms of suppuration, 409

Orsat-Lunge gas apparatu