xviii LIST OF ILLUSTRATIONS 



FIGURE PAGE 



39. Apparatus for combining the methods of exhaustion, hydrogen replace- 



ment, and oxygen absorption 155 



40. Simple apparatus for plate cultivation of anaerobic bacteria 156 



41. Incubator 157 



42. Thermo-regulator 158 



43. Thermo-regulator 158 



44. Moitessier gas-pressure regulator 160 



45. Variations in the conformation of the borders of bacterial colonies . .161 



46. Wolffhiigel counting-plate 162 



47. Types of fermentation tubes 165 



48. Types of gelatin liquefaction by bacteria 169 



49. Intraperitoneal inoculation of rabbit 170 



50. Intravenous inoculation of rabbit . . 170 



51. Intraperitoneal inoculation of guinea-pig 171 



52. Guinea-pig cage i 171 



53. Rabbit cage J 172 



54. Blood-culture plate showing streptococcus colonies .179 



55. Toxin and body cell . . . . 206 



56. Toxin and antitoxin . . . . / 214 



57. Ehrlich's conception bf^cejl^recepiors, giving rise to lytic immune bodies 227 



58. Complement, amboceptor or immune body, and antigen or immunizing 



substance 227 



59. Microscopic agglutination reaction 229 



60. Macroscopic agglutination 230 



61. Ehrlich's conception of the structure of agglutinins and precipitins . . 238 

 82. The structure of cell-receptors and immune bodies, according to Ehrlich's 



conception * 239 



63. Neisser and Wechsberg's conception of complement deviation .... 246 



64. Schematic representation of complement fixation in the Bordet-Gengou 



reaction . . 248 



65. Capillary pipette for removal of exudate in doing the Pfeiffer test . .256 



66. Wright's capsule for collecting blood 284 



67. Pipette for opsonic work 285 



68. Pipette with three substances, corpuscles, bacteria, and serum, as first 



taken up 285 



69. Staphylococcus pyogenes aureus 322 



70. Staphylococcus colonies 323 



71. Micrococcus tetragenus -. . . 334 



72. Streptococcus pyogenes 336 



73. Streptococcus colonies on serum agar 339 



74. Streptococcus colonies from blood culture on blood-agar plate .... 345 



75. Pneumococci 354 



76. Pneumococci 354 



77. Meningococcus, pure culture 372 



78. Meningococcus in spinal fluid 373 



79. Meningococcus culture (streak plate) .375 



80. Gonococcus pus from urethra 38J 



