329 
Gram stain, 315 
Granville wilt, 303 
Green manuring, 108, 123 
Hard cheese, 197 
Hay, bacteria in, 322 
curing of, 239 
Hemp, 234 
Higher fungi, 6 
Hoof rot, 289 
Hog cholera, 285 
Horse sickness, 291 
Humus, 40 
Ice, 134 
Indol, test, 318 
Inflammation, 289 
Inoculation, protective, 258 
diseases controlled by, 260 
Inorganic foods, 39 
Iron, 117 
salts, 38 
Immunity, 253, 257 
Isolation of bacteria, 313 
Katabolism, 24 
Kefir, 158 
Kummys, 1 57 
Lactic acid bacteria, 143 
protective action of, 1 60 
Lactic fermentation, 30, 34 
Leben, 158 
Leeuwenhoek, i 
Legumes, use of, 104 
value of, 95 
Leptothrix, 12 
Limburger cheese, 207 
Lime, 39, in 
Liming of soil, 56, 94, 121 
Linen, 234 
Liquefaction of gelatin, 151 
Lockjaw, 287 
Lophotrichic bacilli, 11-12 
Lumpy jaw, 288 
Magnesia, 39 
Malignant tumor, 288 
Manure, 120, 122 
bacteria in, 319 
fresh and ripened, 7 5 
heap, bacteria in, 70 
composition of, 69 
fermentation of, 71, 74 
losses from, 70 
protection of, 73 
Mastitis, 289 
Mazoon, 158 
28 
Metabolism, 24 
Metacoccus, 12 
Methylene blue, solution, 314 
Micrococcus, 12 
Microorganisms, meaning of term, 5 
Microscopic study of bacteria, 314 
of yeast, 316 
Microsporon, 12 
Mildews, 295 
Milk, bacteria in, 137 
bacteriological analysis of, 
321 
Milk bacteria, growth of, 1 59 
sources of, 138 
Milker, 42, 166 
Milk faults, miscellaneous, 157 
Milking machines, 168 
room, 167 
Milk pail, 168 
standard, 178 
vessels, 141, 167 
Mineral ingredients in soil, 40 
Moisture, relation to, 19 
Molds, 6 
study of, 322 
Monotrichic bacilli, 11,12 
Motility, ii, 315 
Mu'cor, 7 
Multiplication of bacteria, 14 
Mushrooms, 6, 44 
Mycoderma, 217 
Navel ill, 289 
Neutral types, 1 53 
Nitragin, 107, 119 
Nitrates, 38, 47, 57, 59, 77 
Nitrification, 30, 57, 63, 64, 65 
Nitrifying organisms, 58, 60, 61 
Nitrites, 57, 59 
Nitrobacter, 60 
Nitrogen cycle, 89 
fixation, 92, 101, 320 
fixing bacteria, 93, 95 
Nitrogenous food, 47 
Nitrogen, loss of, 90 
Nitrosococcus, 60 
Nitrosomonas, 60 
Number of bacteria, determination 
of, 312 
Oidium lactis, 224, 240 
Oleomargarine, bacteria in, 193 
Olive knot, 305 
Ophidimonas, 1 1 6 
Organic foods, 39 
Organized ferments, 26, 31 
Oxidizing fermentation, 30 
Parasites, 21, 251 
