PLATE IV. 



1*10. 10. Negri bodies in nerve cells in rabies (hippocampus of dog). 

 Alcoholic eosin and methylene-blue. x 1000 diameters. 



Fio. 17. Bacillus postis, showing involution forms, from a salt-agar 

 culture. X 1000 diameters. 



Fig. 18. Blood film, showing tho spirochete of relapsing fever. 

 Leishman's stain.* X 1000 diametors. 



Fig. 19. Cholera spirillum, from a 12-hours' agar culture, showing 

 flagella. X 1000 diameters. 



Fio. 20. Bacillus tetani, showing spores. X 1000 diameters. 



