LIST OF ILLUSTRATIONS. xix 



FIG. PAGE 



85. Portion of film of gonorrhoeal pus. x 1000 224 



86. Gonococci, from a pure culture on blood agar. x 1000 .... 225 



87. Tubercle bacilli, from a pure culture, on glycerin agar. x 1000 . . 239 



88. Tubercle bacilli in phthisical sputum, x 1000 . . . . . 239 



89. Cultures of tubercle bacilli on glycerin agar 242 



90. Tubercle bacilli in section of human lung in acute phthisis. X 1000 . 247 



91. Tubercle bacilli in giant-cells. X 1000 248 



92. Tubercle bacilli in urine. X 1000 248 



/93. Moeller's Timothy-grass bacillus, x 1000 255 



94. Cultures of acid-fast bacilli grown at room temperature .... 256 



95. Smegma bacilli. X 1000 256 



96. Section through leprous skin, showing the masses of cellular granulation 



tissue in the cutis. X 80 268 



97. Superficial part of leprous skin ; the cells of the granulation tissue appear 



as dark patches. X 500 270 



98. High-power view of portion of leprous nodule. X uoo .... 271 



99. Glanders bacilli amongst broken-down cells, x 1000 .... 277 



100. Glanders bacilli, from a pure culture. X 1000 278 



101. Actinomycosis of human liver. X 500 289 



102. Actinomyces in human kidney. X 500 290 



103. Colonies of actinomyces. X 60 291 



104. Cultures of the actinomyces on glycerin agar 294 



105. Actinomyces, from a culture on glycerin agar. x 1000 .... 294 



1 06. Streptothrix madurse. X 1000 ........ 298 



107. Surface colony of the anthrax bacillus. X 30 302 



108. Anthrax bacilli, arranged in chains. X 1000 302 



109. Stab-culture of the anthrax bacillus 303 



no. Anthrax bacilli containing spores. X 1000 305 



in. Scraping from spleen of guinea-pig dead of anthrax, x 1000 . . . 307 



112. Portion of kidney of a guinea-pig dead of anthrax. X 300 . . . 309 



113. Specially large clump of typhoid bacilli in a spleen. X 500 . . . 320 



114. Typhoid bacilli. X 1000 321 



115. Typhoid bacilli from a young culture on agar. x 1000 .... 322 



1 1 6. Stab and stroke cultures of typhoid bacillus and bacillus coli . . . 323 



117. Colonies of typhoid bacillus. X 15 . . . . . . . . 323 



118. Bacillus coli communis. X 1000 325 



118 A. Bacillus dysenteriae, from an agar culture 48 hours old. X 1000 . . 350 



119. Film preparation from diphtheria membrane, x 1000 .... 358 



1 20. Section through a diphtheritic membrane, showing diphtheria bacilli in 



clumps, x 1000 359 



121. Cultures of the diphtheria bacillus on an agar plate 361 



122. Diphtheria bacilli, from a twenty-four hours' culture on agar. X 1000 . 362 



123. Diphtheria bacilli of larger size than in previous figure. X 1000 . . 362 



124. Involution forms of the diphtheria bacillus, x 1000 .... 362 



125. Pseudo-diphtheria bacillus (Hofmann's). Young agar culture. X 1000 371 



126. Film preparation of discharge from wound in a case of tetanus. X 1000 377 



127. Tetanus bacilli, showing flagella. x 1000 378 



128. Spiral composed of numerous twisted flagella of the tetanus bacillus. 



X 1000 378 



