None
microbial changes in, 393 of microorganisms 87 INDEX OF SUBJECTS. 715 Food, mineral, 92 nitrogenous, 91 amido-acids, 91 ammonia, 91 nitrates, 91 nitrogen (free), 91 proteins, 91 urea, 91 non-nitrogenous, 90 alcohols, 90 carbohydrates, 90 fats, 90 hydrogen, 90 methane, 90 organic acids, 90 milk as, 292 normal fauna of, 385 normal flora of 385 nutritive value of chemically pre- served 405 palatability changes by heat, 384 pasteurization of, 319, 385 physical changes by heat, 383 plant, assimilation of, 234 poisoning, 411 preserved by chemicals, 402 by drying, 374 by heat, 381 by refrigeration, 318, 395 required, amount, 88 sterilization of, 388 vital disorganization of, 385 Formation of soil, 284 Frozen milk, 371 GEMMA, 13 Gemmulation, 72 Genito-urinary tract, 547 Germicides, 173 Germicidal action in milk, 321, 323 Ginger beer, 443 Glycogen, 88 Gonorrhoea, serum for, 46 Gravity, influence of, 169 Growth, inhibition of, 173 stimulation of, 171 Guaranteed milk, 295 HAIL, microorganisms in, 199 Haptophile receptors, 555 Haptophore group, 555 Heat production, 128 Helio taxis, 164 Heliotropism, 164 Hemolysiris, 559 Hemoopsonins, 567 Hippuric acid, 117 History of microbiology, i History of non-symbiotic nitrogen-fixa- tion, 269 History of symbiotic nitrogen-fixation, 278 Hydromel, 442 Hydroxy-acetic acid, 115 Hydroxy-phenyl-acetic acid, 116 Hypha, 12 ICE CREAM, 372 poisoning, 416 Immunity, acquired, 552 active, 552 definition of, 541 exhaustion theory of, 574 familial, 544 general, 541 individual, 544 natural, 543 noxious retention theory of, 574 passive, 552 phagocytic theory of, 575 plants, 490 racial, 544 side chain theory of, 574 theories of, 574 Index, opsonic, 566 percentage, 566 phagocytic, 566 Indigo, 465 Indol, 114 Infection, air-borne, 190, 524 animal carriers of, 526 700 avenues of, 533 carriers of, 526, 527 cause of, 534 channels of, 520 contact, 527 defined, 520 droplet, 525 dust, 524 factors influencing, 532 food, 526 human carriers, 527 manner of entering body, 523 milk-borne, 313 number of organisms involved in, 533 resistance against, 534 routes of, 528 soil, 525 sources of, 523 variations of, 531 virulence of, 532 water-borne, 196, 525 Inflammatory processes, 548 Inheritance of disease, 542 7i6 INDEX OF SUBJECTS. Intestines, 547 Introduction, 2 Invisible organisms, 64 determination of, 66 evidences of, 64 Iron in soil, 290 Isoprecipitin, 571 KATABOLISM, 130 theory of, 144 Kepfir, 367 Koji, 443 Kumiss, 367 LAKES, microorganisms in, 200 Leben, 369 Leucin, 114 Leucocytes in milk, 331 Leucocyte toxins, 564 Light, heliotaxis, 164 heliotropism, 164 influence of, 162 upon organisms in water, 201 phototaxis, 164 phototropism, 164 production, 129 radium rays, 165 x-rays, 165 Lime in soil, 244, 284, 286 Lungs, 546 Lysinogen, 560 Lysins, bacterio-, 559 cyto-, 559 hemo-, 559 structure of, 560 MAGNESIUM in soil, 245, 284, 286 Mallein, 488 Manganese in soil, 291 Mead, 442 Mechanical effects, influence of, 168 Media, beer as, 435 influence of physical structure, 167 must as culture, 418 soil as culture, 227 wine as culture, 418 Metabiosis, 182 Metabolism, action of microorganisms on, 538 mechanism of, 130 of microorganisms, 81 physical products of, 128 products of, 101 theory of, 130 Methods of studying bacteria in soil. 241 Methyl-guanidin, 115 Mexican pulque, 442 Microbiology, of air, 185 of alcohol, 418 distilled, 443 products, 418 of beer, 435 of bread, 460 of butter, 335 of cheese, 346 of cider, 440 of compressed yeast, 460 of dairy (various) products, 363 of food poisoning, 411 of foods preserved by chemicals, 402 of food preserved by cold, 395 of foods preserved by drying, 374 of foods preserved by heat, 381 of ginger beer, 443 history of, i of human and animal diseases, 520 of hydromel, 442 of immunity, 541 of indigo, 465 of mead, 442 of milk, 292 of perry, 440 of plant diseases, 490 of pombe, 443 of retting, 465 of rice, 443 of sake, 443 scope of, 9 sera, 480 of antisera, 480 of sewage, 212 of soil, 226 of starch, 463. of sugar, 463 of susceptibility, 541 of tanning, 465 of tobacco, 464 of vaccines, 467 of vegetables (pickles, sauerkraut, etc.), 462 of vinegar, 448 of water, 192 of wine, 418 Microorganisms, acetic in vinegar, 448 in wine, 423 acid-forming in milk, 306 aerobic, in soil, 270 in wine, 423 air, 185, 191 algae in soil, 240 anaerobic, in sewage, 213 in soil, 240 in wine, 424 B. coli in water, 195 INDEX OF SUBJECTS. 717 Microorganisms, B. coli-aero genes in. milk, 310 enteritidis sporogenes in water, *95 typhosus in milk, 313 in water, 196 bacteria, in bread, 460 in beer, 436 on grapes, 422 in productive soil, 240 in soil, 240 in unproductive aoil, 240 Bact. bulgaricum in milk, 311 lactis acidi in milk, 308 lactici acidi in udder, 299 lactis aerogenes in water, 295 in body of sound individuals, 523 butyric in wine, 426 chromophorous bacteria, 1 20 chromoporous bacteria, 120 of cider, 440 classes in water, 193 cocci in milk, 312 complexity in sewage, 212 cosmopolitan saprophytes, 16 of cream, 337 decrease in water, 201 determination in air, 187 development in milk, 313, 321 dissemination of pathogenic, 313, 535 in dust of stable, 304 effect on animal body, 538 elimination from body, 536 energy supply of, 84 entrance to air, 186 facultative anaerobes, 94 in feed for cattle, 305 food of, 87 food required for, 88 in foods, 374, 385, 395. Microorganisms, yeast of vinegar, 448 Milk, acid bacteria and health of, 328 acid curdling of, 323 acid forming bacteria in, 306 aeration of, 316 air contamination of, 301 alcoholic, 326 analysis of, 331 B. coli aerogenes in, 310 Bact. bulgaricum in, 311 lactis acidi in, 308 bitter, 326 butter-, 371 Boston certified, 296 Boston common, 294 centrifugal separation of, 317 certified, 295 Boston, 296 Brooklyn, 296 Chicago, 296 New York City, 296 changes due to organisms, 293 chemicals in checking bacteria, 320 Chicago common, 294 certified, 296 cocci in, 312 common, 293 Boston, 294 Chicago, 294 Connecticut cities, 294 Ithaca, 294 Montclair, 294 Rochester, 294 condensed, 363, 387 sweetened, 363 unsweetened, 364 concentrated, 364 powdered, 366, 380 contamination of, 313 curdling by acid, 351 by rennin, 351 development of bacteria in, 313, 321 dirt in, 326 disease carrier, 3 28 diseases, epidemics, 329 non-epidemic, 329 drinks, 366 butter-milk, 371 kepfir, 367 kumiss, 367 leben, 369 yahourth, 369 dust, influence of, 304 feeding, influence on germ content,3o5 fermentation (abnormal) of, 324 as food, 292 frozen, 371 Milk, germicidal action, 321, 323 guaranteed, 295 house, 301 inspected, 295 Ithaca, 294 leucocytes in, 331 market, 292 microbial content of, 293, 306 microscopic method of analyses, 331 milker in relation to, 302, 306 Montclair (N. J.), 294 neutral bacieria, 312 New York certified, 296 odors, 292 pail, 304, 305 pasteurization of, 319 pathogenic bacteria in, 313, 329 periods of change, 321 plating method of analysis, 331 poisoning, 416 powdered, 366, 380 proteolytic bacteria in, 313 proteolytic changes in, 323 quality for cheese making, 347 ripening of, 350 ropy, 325 Rochester, 294 selected, 295 slimy, 325 sources of organisms in, 297 special, 295 standards of, 332 straining of, 315 sweet curdling of, 324 taints, 292 temperature, influence on germ con- tent, 318 tests for quality, 349 utensils for, 303, 305 value of standards and analyses, 332 water supply in relation to, 303 Msp. comma in water, 196 Milk-borne diseases, 313, 329 Milker in relation to milk, 302, 306 Milk-house, air of, 301 Mineralization of organic matter in soil, 231 Moisture, 147 content of microorganisms, 87 influence of, 147 in soil, 227 Molds, in disease, 576 of fermentation, 16 on grapes, 419 in soil, 238 Morphological groups of bacteria in soil, 241 INDEX OF SUBJECTS. 719 Mo to, 443 Mouth, 546 Must of grapes, 418 Mutual influences, 181, 184 Mycelium, 12 NASAL cavity, 546 Neurin, 115 Neutral bacteria in milk, 312 Nitrification, accumulation of nitrates, 262 of ammonia, 84 disappearance of nitrates, 262 environmental relations, 260 experimental study, 257 nitric bacteria, 259 nitrous bacteria, 259 Nitrogen, addition to soil, 245 cycle, 126 Non-symbiotic nitrogen fixation, 269 aerobic species, 270 anaerobic species, 270 energy relations, 270 history of, 269 Noxious retention theory of immunity, 574 Number of bacteria in soil, 240 Nutrition of microorganisms, 81 OBLIGATE, parasites, 76 saprophytes, 7 6 Opsonic index, 556 Opsonins, 565 hemo-, 567 index of, 566 Opsonogens, 565 Origin of carbohydrates in soil, 246 fats in soils, 249 soil, 284 waxes in soil, 249 Osmotic pressure, 147 Outlines of plant groups, 10 of protozoal groups, 10. u Oxidation, of alcohol, 93 Of ammonia, 84 bacteria, 218 of carbon, 231, 244 of carbon monoxide, 248 of hydrogen, 231, 248 of hydrogen sulphide, 92 of hyposulphite, 84 influence on organisms in water, 202 of methane, 248 of nitrites, 259 of nitrogen, 231, 244 rate in carbon, 231 of sulphur, 93 in water, 202 Oxygen, influence on different species 94, 95 PARACHROME bacteria, 120 Parasitic molds, 17 Parasites, facultative, 17, 76, 521 obligate, 76, 521 of uncertain position, 79, 689 Parenchymatous tissues, action of micro- organisms on, 539 Pasteurization, of beer, 386, 439 of cream, 342, 386 economic importance of, 385 of food, 385 of fruit juices, 386 of milk, 319, 386, Pathogenic bacteria, in butter, 345 in milk, 313, 329 Percentage index, 566 Perithecium, 14 Perry, 440 Phagocytic, index, 566 theory of immunity, 575 Phagocytosis, 565 Phosphorus, cycle of, 128 in soil, 245, 287 Phototaxis, 164 Photo tropism, 164 Phylogeny, 13 Physical influences of microorganisms, 147 Physiological groups, 98 of bacteria in soil, 24 variation, 104 Physiology of microorganisms, 81 Phy to toxins, 123 Pickles, 462 Pigment, 119 bacteriopurpurin, 120 carotin bodies, 121 chromogens, 120, 121 chromophorous bacteria, 120 chromoporous bacteria, 120 fluorescent, 120, 121 parachrome bacteria, 1 20 prodigiosin bodies, 121 solvents, 121 Plant food in soil, 234 groups, 10 Plasmolysis, 148 colloidal substances, 150 salt solutions, 149 sugar solutions, 149 water, 148 Poisoning, by cheese, 416 chemical nature of, 417 classes of food, 412 due to saprophytic changes, 414 720 INDEX OF SUBJECTS. Poisoning, by fish, 415 by foods, 411 ice cream, 416 infections transmitted, 413 by meat, 415 by milk, 416 by sausage, 415 by shell fish, 416 by vegetables, 416 Poisons, 173 Pombe, 443 Potassium in soil, 290 Powdered milk, 366 Precipitate, 572 Precipitinogen, 572 Precipitins, anti-, 572 auto-, 571 co-, 573 forensic use, 572 iso-, 571 mechanism of, 571 normal, 571 specific inhibition, 572 Precipitoid, 572 Predisposition to disease, 542 Preservation by chemicals, 402 by cold, 395 by drying, 374 by heat, 381 Preservatives, alcohol, 176, 178, 408 benzoic acid, 177, 408 boric acid, 407 effect on system, 406 formaldehyde, 176, 179, 408 formic acid, 408 hydrogen peroxide, 179 inorganic, 407 nitric acid, 407 nitrous acid, 407 organic, 408 ozone, 179 preserving by chemical action, 406 by physical action, 406 salicylic acid, 177, 408 sodium chloride, 176, 406 sulphurous acid, 180, 407 vinegar, 177 wood smoke, 409 Pressure, influence of, 168 Protection against disease, conjunctiva, 547 cutaneous orifices, 545 geni to-urinary tract, 547 inflammatory processes, 548 intestines, 547 lungs, 546 mouth, 546 Protection against disease, nasal cavity. 546 natural antibacterial substances, 550 natural antitoxins, 549 normal agglutinins, 551 hemolysins, 551 precipitins, 552 skin, 545 stomach, 546 Proteins, bacterial, 535 as food, 91 in soil, 251 toxic, 122, 417, 535 Prototoxoids, 558 Protozoa, classification, 76 functions, 70 locomotion, 71 flagella, 71 myonemes, 71 metabolism, 71, 82 reproduction, 71 anisogamous, 74 binary division, 72 chromosomes, 74 conjugation, 74 copula, 74 copulation, 74 developmental cycle, 75 encystment, 75 isogamous, 74 macrogametes, 74 merozoites, 74 microgametes, 73 mitosis, 74 schizogony, 73 self -fertilization, 74 sporozoites, 73 zygote, 74 general, 68 groups, 10, ii influence on organisms in water, 202 parasitism, 75 commensals, 76 facultative parasites, 76 obligatory parasites, 76 . saprozoic parasites, 76 structure, 69 chromatin, 70 cytoplasm, 70 ectoplasm, 70 endoplasm, 70 linin, 70 nucleus, 70 organellae, 71 technic, 80 Protozoal groups, 10, 1 1 Pseudo-yeasts on grapes, 421 Ptomains, 114, 115 INDEX OF SUBJECTS. 721 Purification of water, by chemicals, 208 heat, 208 ozone, 207 Putrescin, 115 RABIES, serum for, 485 vaccine, 473 Radium rays, 165 Ragi, 447 Rain, microorganisms in, 198 Rate of oxidation, 231, 244 carbon in soil, 231, 244 hydrogen, 231 nitrogen in soil, 231, 244 Reaction of soil, 235 Reduction of, nitrates, 96, 118, 217, 264 nitrites, 218, 264 sulphate, 96, 119, 217, 289 Refrigeration, 158, 395 after-storage changes, 397 of butter, 400 chilling changes, 395 of eggs, 399 of fish, 397 of food-stuffs, 395 of fruits, 400 legal control of, 401 of meat, 397 j of milk, 400 of poultry, '397 storage changes, 396 of vegetables, 400 Resistance of spores, 160 Retting, 465 Rice beer, 443 Ripening of milk, 350 Rivers, microorganisms in, 200 Ropy milk, 325 Rotation of elements, 127 SAKE, 443 Sand filter, 205, 222 life in, 221 Saprophytes, 76 cosmopolitan, 16 facultative, 521 obligate, 17, 76, 521 Sauerkraut, 462 Schizogony, 73 Sclerotium, 13 Seasonal influence on soil, 232 Sea water, microorganisms in, 201 Sedimentation, influence on germ content of water, 202 Septic tank, 224 Septum, 12 Serum, antidiphtheritic, 480 46 Serum, antidysenteric, 485 antigonococcic, 485 antimicrobial, 484 antirabic, 485 antistreptococcic, 484 Dorset-Miles, 484 Sewage, anaerobic organisms, 213 fermentation of, 214 cellulose, 215 fats, 216 proteins, 214 urea, 214 filters, 223 microorganisms of, 212 cultivation of, 222 destruction by biological pro- cesses, 224 by chemical processes, 225 life in filters of, 221 longevity of pathogenic organism in, 220 oxidizing bacteria of, 218 pathogenic bacteria in, 220 prevalence of pathogenic, 220 reduction of nitrates, 218 nitrites, 218 sulphates, 217 septic tank for, 224 streptococcic in water, 194, 204 tanks, 224 Side-chain theory of immunity, 574 Skatol, 114 Skin, 545 Slimy milk, 325 Smallpox, vaccine, 470 Snow, microorganisms in, 119 Soil, acidity, 235 causes of, 236 number of organisms, influenced by, 236 range of, 235 species, influenced by, 236 aeration, 230 aerobic activities, 231 algae in, 239 aluminum in, 291 ammonia formation, 254 transformation, 266 ammonification, 253 climatic conditions influencing, 254 efficiency of different species, 256 experimental study, 253 mechanism of, 254 numbers involved, 256 species involved, 256 anaerobic activities, 231 722 INDEX OF SUBJECTS. Soil, bacteria, 240 aerobic species, 270 anaerobic species, 270 at different depths, 241 distribution, 240 groups (morphological and physiological), 241 methods of study (quantitative and qualitative), 242 nitric, 259 nitrous, 259 number, 240 productive soil, 240 unproductive soil, 240 bacterial substance available, 266 substance present, 265 biological factors of soil-forma- tion, 284 calcium, 244, 286 carbohydrates (origin), 246 carbon dioxide in, 234 carbon-nitrogen ratio, 252 climatic influences, 232 composition (mechanical), 230 copper, 291 denitrification, 263 environmental relations, 265 experimental study, 263 drought, 229 early, 233 fermentations, cellulose, 246 fats, 249 organic matter, 246 proteins, 251 starches, 248 sugars, 248 waxes, 249 food (plant) assimilation of, 234 (plant) production in, 234 formation of, 284 general discussion, 226 higher plants in, 239 infection, 525 iron, 290 late, 233 magnesium, 245, 284, 286 manganese, 291 medium, as culture, 227 mineral food, 237 mineralization of organic matter, 231 moisture relations, 227 rainfall, 227 range of, 228 molds in, 238 nitrates, transformation of, 266 nitrification, 257 bacteria (nitric and nitrous), 259 Soil, environmental relations, 260 experimental study, 257 nitrates, accumulation, 262 nitrates, disappearance, 262 nitrogen, addition to, 245 nitrogenous compounds, transforma- tion of, 253 nitrogen (atmospheric) fixation, aero- bic species, 270 anaerobic species, 270 biological relations, 269 chemical relations, 269 cultures for inoculation, 282 development of organisms, 276 energy relations, 270 entrance of organisms, 276 environmental relations, 278 inoculations, methods of, 280 mechanism, 277 physiological efficiency, 277 resistance of plants to, 279 specialization of organisms, 273 symbiotic, history of, 278 symbiotic (non), history of, 269 theories of, 268 variations of, 278 organic acids, accumulation of, 250 source of, 250 transformation of, 250 organic matter in, 237 origin of, 284 carbohydrates in, 246 fats, 249 waxes, 249 oxidation of carbon, 231, 244 carbon monoxide, 248 hydrogen, 231, 248 methane, 248 nitrogen, 231, 244 peptone, transformation of, 266 phosphorus, 245, 287 plants (higher in), 239 potassium, 290 production of hydrogen, 248 methane, 248 protein bodies in, 251 amount, 251 quality, 251 protozoa in, 239 reaction of, 235 reduction of nitrates, 264 nitrites, 264 sulphates, 289 seasons, influence of, 232 sulphate reduction, 289 sulphur, 245, 288 temperatures of, 232 233 INDEX OF SUBJECTS. 723 Soil, temperature relations, 232 transformation of nitrogen com- pounds, 253 organic acids, 250 reactions of, 243 Source of organic acids in soil, 250 * Specific gravity of bacteria, 89 Sporogony, 73 Stable, air of, 301, 302 Starch, fermentation of, 463 for manufacture, 463 raw materials of, 463 Sterigma, 15 Sterilization, of corn, 390 economic importance of, 388 of fish, 389 of fruits, 390 of meat, 289 of peas, 390 Stomach, 546 Straining of milk, 315 Streptococcic infections, serum for, 484 Sugar, manufacture, 463 Sulphur cycle, 127 in soil, 245, 288 Susceptibility, 543 definition, 541 familial, 544 general, 541 hyper, 541 individual, 544 natural, 544 racial, 544 Suspensions for agglutination tests, 488 Symbiosis, 181 Symbiotic nitrogen fixation, cultures in, 28 2 development of organisms, 276 entrance of organisms, 276 environmental relations, 278 history of, 278 inoculation, methods of, 280 legume earth for inoculation, 282 mechanism of, 277 physiological efficiency, 277 resistance of plants, 279 specialization, 273 variations, 278 Symptomatic anthrax, vaccine 472 Synthetic media, 99 TAINTS of milk, 292 Tanks, anaerobic, 224 septic, 224 Tanning, 465 Temperature, cardinal points, significance °f> JSS endpoints of fermentation, 157 Temperature, influence on germ content of milk, 318 on germ content of water, 201 maximum, 155 minimum, 154 optimum, 153 resistance of spores, 160 of soil, 232, 233 thermal death-point, 159 Tetanus, antitoxin, 483 Theories of nitrogen-fixation, 268 Thermal death -point, 159 Tobacco, 464 Toxic proteins, 122, 417 Toxins, 122, 123 cyto-, 564 diphtheria, 122, 123 endo-, 535 leucocyte-, 564 neutralization, 557 soluble, 534 tetanus, 122, 123 unit of, 482 Toxoid, true, 559 Toxon, 559 Toxophile receptors, 555 Toxophore group, 555 Transformation of ammonia, 266 nitrates, 266 nitrogen in soil, 253 organic acids in soil, 250 peptone, 266 Trimethylamin, 114 Tryptophan, 114 Tuberculin, Koch's old, 485 Koch's other (T.R., B.E., etc.), 487 Tuberculosis, vaccine, 485 Ty rosin, 114 UDDER of cow, 297 bacteria from quarters, 299 from entire udder, 298 Bact. lactis acidi in, 299 diseased, 299 exterior, 300 healthy, 297 interior, 297 wiping of, 304 Ultramicroscopic viruses, 79 Urea, 93, 117 Uric acid, 117 VACCINE, anthrax, 476 Asiatic cholera, 477 bacterial, 418 blackleg, 472 bubonic plague, 478 724 INDEX OF SUBJECTS. Vaccine, kinds of, 468, 477, 478, 480 manufacture of, 687 rabies, 473 smallpox, 470 tuberculosis, 478 Variation, physiological, 104 Vegetables, 462 pickles, 462 sauerkraut, 462 Vegetation, influence on organisms in water, 202 Vinegar, acetic fermentation, 448 after-treatment of, 458 apparatus for manufacture of, 453 bacteria, 448 cultures for, 453 diseases of, 459 domestic method, 453 fermentation of, 452 German method, 456 manufacture of, 448 Orleans method, 454 Pasteur method, 455 raw materials of, 451 rotating barrel method, 458 starters for, 453 Virulence of infection, 532 Virus, 469 WASSERMAN'S test, 563 Water, analysis (qualitative and quanti- tative), 203, 204 B. coli in, 195 enteritidis in, 195 typhosus in, 196 bacteria of natural, 193 Bact. lactis aero genes in, 195 -borne infections, 196, 525 classes of bacteria in, 193 coagulating basins, 206 decrease of organisms in, 201 dilution of, 202 filters, 205, 207 nitrations, 205, 206 food influences, 201 from hail, germ content, 199 increase of organism in, 201 lake, germ content, 200 light, influence of, 201 microorganisms in, 192 Microspira comma in, 196 oxidation, influence on germ content, 202 protozoa, influence on germ content 202 purification by, chemicals, 208 heat, 208 Water, ozone, 207 from rain, germ content, 198 from rivers, germ content, 200 sea water, germ content, 201 sedimentation of, 205 sewage strep tococcic, 194 from snow, germ content, 199 soil bacteria in, 194 supply for dairy, 303 surface washings in, 194 temperature influence in, 201 in upland surface, 200 vegetation, influence on germ con- tent, 202 from wells, germ content, 199 Weight of bacteria, 89 Wells, construction of, 210 location of, 208 microorganisms in, 199 Wine, acetic bacteria in, 423 aerobic organisms in, 423 anaerobic organisms in, 424 butyric bacteria in, 426 composition of, 418 control after fermentation, 432 of fermentation, 427 on grapes, 427 defined, 418 fortified, 419 lactic bacteria- in, 425 mannitic bacteria in, 425 as medium for cultivation, 418 microorganisms in, 423 mycodermae in, 423 propionic bacteria in, 425 slime-forming bacteria in, 424 X-RAYS 165 YEAST, in beer, 435 in bread, 460 cell of, 29 classification of, 28 compressed, 460 culture of, 34 differentiation of, 36 of ginger beer, 443 on grapes, 420 important, 31 morphology of, 28, 29 of pombe, 34 pseudo-, 34 of vinegar, 448 of wine, 429 Yohourth, 369 ZYGOSPORE, 14 RETURN TO the circulation desk of any University of California Library or to the NORTHERN REGIONAL LIBRARY FACILITY Bldg. 