INDEX 



Mammitis, 384 



Manure, 156 



Manure and the compost heap, 109 ; 

 bacterial growth in, no; composition 

 of, 109; proper treatment of, 113; 

 used fresh, 1 15 



Marl, 113 



Mastitis, 384 



Maze, 142, 146 



Meadows, nitrification in, 105 



Micrococcus, 26 ; casei amari, 266 ; 

 freudenreichii, 203 ; ureae, 83 



Milking machines, 182 



Milk of tuberculous animals, 376 ; sup- 

 ply of cities, 186 



Milk vessels, a source of bacteria, 180 



Milker, a source of bacteria, 181 



Molds, 21, 22, 23, 79, 85 ; in cheese, 

 259, 261, 263 



Mother of vinegar, 279, 280 



Multiplication of bacteria, 30 ; rapidity 

 of, 31 



Mushrooms, 23 ; in decaying wood, 74 



Mycelium, 23 



Mycoderma, 280, 284 



Myricaceae, tubercles on, 159 



NATURAL starters, 241 ; why use- 

 ful, 243 



Nephritis, 352 



Navel-ill, 384 



Nitrate beds of South America, 117 



Nitrates, 76, 86, 90, 91, 94, 96, 98, 104, 

 112, 114, 118, 127, 131, 134, 156; 

 origin of, 69 



Nitrogen, assimilation of, 132, 145 ; com- 

 pounds, necessity of, 66 ; cycle, 98 ; 

 fixation by bacteria, 145 ; fixation by 

 legumes, 148 ; fixation by plants, 146, 

 158; fixation in free soil, 138; fix- 

 ing bacteria, 134; hunger, 140; lib- 

 eration of free, 89 ; loss of, 66 ; of 

 humus, 90; problem, 90; starvation, 

 90, 132 



Nitric acid, 36, 91, 92, 104 



Nitrification, 91, 97, 118; and manure, 

 114; and oxygen supply, 107; in- 

 crease of, 106 ; in forests, 105 ; in 

 sewage, 122, 127; in soil, 98; not 

 in all soils, 104 



Nitrifying bacteria, 93, 105, 106, 117; 

 in soil, 97, 156 



Nitrifying fermentation, 40 



Nitrites, 69, 92, 94, 96, 104, 112, 114 



Nitrobacter, 97 



Nitrobacteria, 96, 104 ; action of organic 

 matter on, loo ; conditions of life of, 

 99, 104 ; source of energy of, 101 

 Nitrogenous decomposition in soil, 88 

 Nitrosobacter, 97 

 Nitrosococcus, 97 

 Nitrosomonas, 96 



Nitrous acid, 92, 104 ; oxidation of, 93 

 I Nitrous bacteria, 96 

 Number of bacteria in milk, 186 



OLEOMARGARINE, bacteria in, 248 

 Organized ferments, 40, 41, 44, 47; 

 and unorganized ferments, 46, 47 

 Oxydase, 294 

 Oxygen, relation of bacteria to, 32 



DASTEUR, 19, 42, 44, 280, 281, 



339, 345, 379 



Pasteurization, 219, 221 ; effect on dis- 

 ease bacteria, 220, 221 ; in cheese- 

 making, 271; in Denmark, 366; of 

 milk, 215, 378 



Parasites, 32 



Parasitic bacteria, 329; in milk, 21 1 



Peas, assimilation of nitrogen by, 137, 



147 



Pear blight, 388 

 Pemmican, 312 



Pepsin, 43, 46 ; in cheese, 255 

 Peptonizing bacteria, 194, 257 

 Perlsucht, 356 

 Person, disinfection of, 400 

 Peroxidase, 294 

 Petiming of tobacco, 295 

 Physical disinfectants, 393 

 Planococcus, 27 

 Planosarcina, 27 

 I Plant diseases, 386 

 Plant foods, 68 

 Platinum black, 279 

 Potato scab, 391 

 Preservation of milk, 215 

 Prevention of access of bacteria, 309 

 Prevention of distribution of bacteria, 



33 2 

 Preventive cultures, 383 ; inoculation, 



345 



Privy vault, 1 20, 167 

 Protection of herd, 365 

 I 'ink-ids, 70, 75, 77, in 

 Proteolytic fermentation, 40 

 Proteus vulgaris, 8 1, 85 

 Ptomaines, 37 

 Ptyalin, 46 



