Phosphorus, 121 
Pleuropneumonia, 307 
Potash, 42, 123 
Potato rot, 325 
tubes, 341 
Powdered milk, 190 
Preservatives, chemical, 261 
in milk, 183 
Preservation of food, 254 
Presumptive test for B. coli, 345 
Proteids, 54 
Proteolytic fermentation, 32 
Proteus vulgaris, 58 
Protozoa, 44, 127 
Pseudomonas, 13 
campestris, 321 
destructans, 328 
fluorescens, 58, 328 
iridis, 328 
prunii, 328 
Stewarti, 326 
vasculans, 327 
Pure cultures, r1 
in butter-making, 201 
tobacco curing, 246 
vinegar-making, 238 
Purification of cultures, 338 
Pus in milk, 149 
Putrefaction, 28, 35, 56, 343 
Putrid butter, 199 
cheese, 218 
Quarter-evil, 309 
Rabies, 314 
Rancidity of butter, 207 
Rauschbrand, 309 
Red milk, 169 
Rennet-forming bacteria, 162 
Rennin, 35 
Reservoir, 143 
Resistance against microdrganisms, 
272-278 
method of increasing, 275 
INDEX 
Rinderpest, 313 
Rinderseuche, 307 
Root tubercle bacteria, 
128, 345 
Root tubercles, 104, 108, 345 
Roquefort cheese, 222 
Rots, 318, 325, 327 
Rotz bacillus, 308 
Rusts, 318 
Rusty spot, 218 
Saccharomyces, 8 
Salt as a preservative, 262 
Saltpeter plantations, 83 
Saprophytes, 23 
Sarcina, 13 
Sauer kraut, 240 
Scarlet fever in milk, 176 
Self-purification of soil, 61 
Septic tank, 90 
Septic sore throat, 176 
Sewage, bacteria in, 344 
composition of, 85 
farming, 86 
treatment of, 85-96 
Sheep-pox, 314 
Sick-room, disinfection of, 349 
Silage, 247 
Silo, 37, 247 
Slimy bread, 232 
milk, 166 
whey in Edam cheese, 219 
Smuts, 318 
Soft cheeses, 219 
Soil, acidity of, 130 
aeration of, 131 
bacteria, 344 
infusion, 105 
inoculation, 113, 128 
microérganisms in, 43 
nitrogen in, 71 
origin of, 45 
structure of, 45 
texture of, 45 
355 
TO6—-I1T, 
