THE BACTERIA IN CONTAGIOUS MALADIES. 169 



been studied by Luginbiihl, Weigert, Hallier, 

 and Cohn. These micro-organisms possess the 

 characters of all the spherical bacteria, and are 

 found in the variolous pustules, the rete Malphiyii, 

 the liver, the spleen, the kidneys, and the lym- 

 phatic ganglia. "We can only insist upon the fact 

 of the concomitance of the variola and the pres- 

 ence of Micrococcus, since experiment cannot be 

 resorted to in this disease, of which the complete 

 evolution only occurs in man. We also find in 

 vaccine lymph analogous Micrococci, in every 

 point of view, to those of variola. Cohn considers 

 them both, not as distinct species, but as two races 

 of the same species, — the Micrococcus vaccinae. 



Scarlatina. — Coze and Feltz have found in 

 the blood of scarlet-fever, taken from patients, 

 living or recently dead, some rods as well as mo- 

 bile points. This blood injected into the cellular 

 tissue of rabbits has sometimes produced death, 

 and the blood of the animals experimented upon 

 has presented the same bacteria as human blood 

 of scarlatina : they are simply a little larger and 

 longer. As to the mobile points, they appear 

 to correspond to the Micrococcus of scarlatina 

 described by Hallier. 



Rugeola. — The examination of the blood of mea- 

 sles has shown to the same experimenters, bac- 

 teria of extreme minuteness and great mobility. 

 The inoculation of this blood has not produced 

 the death of rabbits ; however, these animals have 



