Autolysis, 149 self-digestion, 126 Autotrophic, 86 Available nitrogen, loss of, 113 Azotobacter, 118 B BABES-ERNST corpuscles, 45 Bacilli, butter, 209 colon, 248 grass, 209 size and shape of, 52 tubercle, chemical analysis of, 85 Bacillus, 52, 60, 62 _anthracis_, 17, 36 spore staining, 209 Bacillus of blue milk, 31 Ducrey’s, 245 _subtilis_, 77, 83 spore staining, 209 Bacteria, absorption of N by, 117 acid fast, 84, 209 adaptability, range of, 90 advantage of motility to, 45 aids in isolation of, 197 anaërobic, 32 cause of disease in animals, 30 of souring of milk, 32 cell groupings of, 55 chains of, 38 chemical composition of, 39, 81 elements in, 82 classed as fungi, 37 as plants, 33, 35 definition of, 40 development of, 90 distribution of, 71 energy relationships, 39 environmental conditions for growth, 72 first classification of, 34 drawings of, 20 seen, 19, 33 food relationships of, 39 injurious, 72 isolation of, 194 measurement of, 40, 203 metabolism of, 86 methods of study of, 171 morphology of, 41 motile, 45 nitric, 114 nitrous, 114 nucleus of, 42 occurrence, 71 pathogenic, outside the body, 237 phosphorescent, 111, 112 position of, 37 rate of division, 43 of motion, 45 relation to algæ, 33, 37 to elements, 86 to gas and oil, 95 to phosphate rock, 115 to protozoa, 40 to soil fertility, 120 to sulphur deposits, 116 to yeasts and torulæ, 37 reproduction of, 37, 55 root tubercle, 86, 87 size of, 37, 40 soil, chief function of, 119 source of N, 102 speed of, 45 spiral, 53 staining of, 204-212 sulphur, 63 thermophil, 75, 77 universal distribution of, 90 in vinegar-making, 99 BACTERIACEÆ, 62, 66, 70 Bacterial agglutinin, 265 vaccines, 282 preparation of, 283, 284 Bacterin, 253 Bacteriocidin, 272 Bacteriological culture tubes, 184 examination, material for, 228 microscope, 200 Bacteriology, pathogenic, definition of, 231 reasons for study of, 217 as a science, 17, 32 Bacteriolysin, 272 Bacteriopurpurin, 62, 63, 112 Bacteriotropin, 281 _Bacterium abortus_, agglutinin of, 265 _coli_ in autoinfection, 234 gas formation by, 95 oxygen limits for, 77 pneumonia through intestinal route, 246 in preparation of sugar broths, 176 definition of, 62, 67, 70 _enteriditis_, cause of food poisoning, 104 _fluorescens_, oxygen limits, 77 _typhosum_, 73 agglutinin, 265 in phenol coefficient method, 166 pneumonia through intestinal route, 246 Ballon pipette, 193 Balsam, mounting in, 207 BARBER, 253 apparatus, 196 Barnyards, disinfection of, 167 Baskets, wire, 184 BASSI, 27 silkworm disease, 34