QUARTERLY CHRONICLE. 59 
congested; and not only were the vessels unnaturally dilated, 
but each was more or less surrounded by a granular and 
originally fluid exudation, in which the natural tissue of the 
part became broken down and ultimately dissolved. In fig. 1, 
a large triangular mass of this exudation is represented at a, 
where it occupies the bottom of the anterior median 
fissure (0), and has destroyed a part of the anterior commis- 
sure by extending to the right as far as ec. The same parts, 
of the gray substance of other sections, more highly magni- 
fied, are represented in Figs. 2 and 3. In Fig. 2, a large 
quantity of granular exudation (a) has enveloped and partially 
destroyed some blood-vessels, and the pia mater which sup- 
ports them. ‘The exudation extends to the left, around the 
bottom of the anterior column (e), destroying a portion of 
the anterior commissure, and following the course of an 
evidently diseased blood-vessel (f/f) imto the middle of the 
anterior cornu (g), where it has destroyed a part of the gray 
substance. In Fig. 3, we find at a the same kind of granular 
exudation enveloping the pia mater and blood-vessels which 
enter at the anterior median fissure; and at h/, in the 
same figure, is a separate and oval mass of the same kind of 
exudation, surrounding the cut end of one of the blood- 
vessels as it bends round on the right side of the canal. On 
the left side of the canal, at k, is another elongated, finely 
granular, and almost pellucid area of degeneration. On turn- 
ing to Fig. 1, we find that small areas or patches (d, d, d, d), 
