viii ILLUSTRATIONS 



39. Characters of surface elevation 114 



40. Characters of growth in depth of media 115 



41. Types of liquefaction in gelatin stab cultures 115 



42. Watch glasses 116 



43. Cover-glass preparation of market milk 181 



44. Chart showing germicidal action of milk 182 



45. Six forms of streptococci 194 



46. Streptococcus pyogenes 197 



47. Streptococcus of mastitis 204 



48. Micrococcus pyogenes aureus 208 



49. Bacterium anthracis 222 



50. Anthrax bacteria 223 



51. Anthrax bacteria 223 



51. Anthrax bacteria on agar plate culture 224 



52. Colony on agar of anthrax bacteria 224 



53. Bacterium mallei in tissues 235 



54. Bacterium tuberculosis (human) 246 



55. Bacterium tuberculosis (bovine) 246 



56. Photograph showing tubercle bacteria in milk 247 



57. Cultures of tubercle bacteria 249 



58. Glycerin agar culture of avian tubercle bacteria 260 



59. Avian tubercle bacteria 261 



60. Bacterium suisepticum 272 



61. Bacterium pullorum 276 



62. Bacterium sanguinarium 289 



63. Bacterium lactis acidi 301 



64. Bacterium subviscorum 306 



65. Resemblance in morphology of bacteria belonging to dif- 



ferent species 310 



66. Bacillus suipestifer in a smear preparation 317 



67. Bacillus tetani 329 



68. Bacillus of blackleg showing spores and flagella 336 



69. Bacillus of malignant oedema showing flagella and spores 340 



70. Bacillus alvei 345 



71. Bacillus vulgaris 351 



72. Bacillus vulgaris showing flagella from agar culture 12 



hours old ' 351 



73. Colony of Bacillus vulgaris four days old 352 



74. Pseudomonas pyocyaneus 356 



75. Actinomyces bovis 361 



76. Actinomyces bovis. Section of actmomycotic tissue show- 



ing small clumps of the fungus 361 



77. Actinomyces pulmonalis 363 



78. Yeasts . 366 



