LIST OF ILLUSTRATIONS. xiii 



FIG. PAGE 



18. FROM A SIMILAR PREPARATION 58 



19. P'ROM A SIMILAR PREPARATION 58 



20. PLATE-CULTIVATION IN GELATINE FORTY -EIGHT HOURS 



OLD, SHOWING YOUNG COLONIES OF CHOLERAIC 

 COMMA-BACILLI 62 



21. PLATE CULTIVATION WITH COLONIES OF CHOLERAIC 



COMMA-BACILLI SEVENTY-TWO HOURS OLD 66 



22. FROM A CULTIVATION OF CHOLERAIC COMMA-BACILLI IN 



GELATINE IN A GLASS DISH FOUR DAYS AFTER 

 INOCULATION IN SPOTS 67 



23. PLATE CULTIVATION OF CHOLERAIC COMMA-BACILLI IN 



GELATINE AFTER FOUR DAYS AT i9C 68 



24. A COLONY OF CHOLERAIC COMMA-BACILLI IN GELATINE, 



SEVENTY-TWO HOURS OLD 71 



25. CULTIVATIONS OF CHOLERAIC COMMA-BACILLI .... 7477 



26. STABCULTURES OF CHOLERAIC COMMA-BACILLI IN NUTRI- 



TIVE GELATINE AFTER ONE, THREE, FOUR, FIVE, 

 SEVEN, AND TEN DAYS RESPECTIVELY 79 



27. COVER-GLASS SPECIMEN OF TINKLER'S COMMA-BACILLI 



FROM A GELATINE CULTURE 83 



28. GELATINE PLATE CULTIVATION OF FINKLER'S COMMA- 



BACILLI AFTER INCUBATION FOR FORTY-EIGHT 

 HOURS AT 20C 86 



