PATHOLOGICAL PHYSIOLOGY. 
393 
and contrary to the bacteria of tuberculosis, are colored with the 
liquid of Weigert. The bacteria of tuberculosis are very small, 
and of a length which ordinarily varies from one-quarter to one- 
lialf of the diameter of a red corpuscle; seldom do they reach a 
length equal to the diameter of the corpuscle. 
They are found in abundance in all the parts where the mor¬ 
bid process is recent and progresses rapidly. They are also often 
seen, grouped in fasciculi, in the interior of the cells, as in lepra, 
but there are besides abways some free, especially on the edges 
of the large caseous collections. 
When the height of tuberculous eruption has subsided they 
ITecome more rare, and are entirely missing only where the mor¬ 
bid process has ceased. 
When tuberculous tissues contain giant cells, it is in their 
interior that bacterian rods are better found; it is even the only 
place where they are ordinarily, when the tuberculosis progresses 
slowly; they collect principally in the youngest giant cells. 
Without any preparation or coloration, bacterise may be seen, 
providing the parts examined contain plenty, such as the grey 
granulation from the lung of a guinea pig which had died with 
inoculated tuberculosis. It is sufficient to add to the piece 
of granulation a little bloody serum to examine it in a deep porte- 
object, to avoid the motions of the liquid. The bacterias then 
have the aspect of very line rods, with a purely molecular motion, 
without any trace of movements proper .—Revue des Sciences Med¬ 
icate. 
PATHOLOGICAL PHYSIOLOGY. 
AWAY TO GIVE IMMUNITY AGAINST SYMPTOMATIC OR BACTERIAN 
ANTHRAX WITH ATTENUATED VIRUS. 
By M. Arloing, Cornevin & Thomas. 
.— 9 
We have succeeded in giving immunity against symptomatic 
anthrax by inoculation of the natural virus into the veins and in 
the tracheo-bronchial canals. Intra-venous injection has even 
been applied upon a large scale, and its efficiency confirmed. 
