PLATE I. 



PHOTOMICROGRAPHS OF BACTERIA MADE BY GASLIGHT, 



FIG. 1. Streptococcus cadaveris, from a culture in aguacoco; stained 

 with fuchsiu. x 1,000. (Sternberg.) 



FIG. 2. Streptococcus Havaniensis. X 1,000. From a photomicro- 

 graph. (Sternberg.) 



FIG. 3. Bacillus cuniculicida Havaniensis, from peritoneal cavity of 

 inoculated rabbit, showing leucocytes containing bacilli and free bacilli; 

 stained with fuchsin. X 1,000. (Sternberg.) 



FIG. 4. Bacillus cadaveris, smear preparation from yellow-fever 

 liver kept for forty-eight hours in an antiseptic wrapping (Havana, 

 1889); stained with fuchsin. x 1,000. (Sternberg.) 



Note. All of the above photomicrographs were made with the three- 

 millimetre apochromatic horn. ol. iin. objective and projection eye-piece 

 of Zeiss. 



PLATE II. 



PHOTOGRAPHS OF COLONIES (iN ESMARCH ROLL TUBES) AXD OF TEST- 

 TUBE CULTURES. 



FIG. 1. Colonies of Bacillus leporis lethalis, in gelatin roll tube, 

 end of forty-eight hours at room temperature. X 5. (Sternberg.) 



FIG. 2. Colonies of Bacillus coli similis in gelatin roll tube, end of 

 twenty-four hours at 22 C. x 10. (Sternberg.) 



FIG. 3. Stick culture of Bacillus coli similis in nutrient gelatin, end 

 of seven days at 20 C. (Sternberg.) 



FIG. 4. Stick culture of Bacillus intestinus motilis in nutrient gel- 

 atin, end of four days at 22 C. (Sternberg.) 



FIG. 5. Stick culture of Bacillus leporis lethalis in nutrient gelatin, 

 end of eight days at 22 C. (Sternberg.) 



FIG. 6. Stick culture of Micrococcus tetragenus versatilis in nutrient 

 gelatin, end of two weeks at 22 C. (Sternberg.) 



FIG. 7. Colonies of Bacillus cuniculicida Havaniensis in gelatin roll 

 tube, end of forty-eight hours at 21 C. X 10. (Sternberg.) 



FIG. 8. Colonies of Bacillus coli communis in gelatin roll tube, end 

 of forty-eight hours at 22 C. X 10. (Sternberg.) 



