PATHOLOGY OF EQUINE SYPHILIS. 
493 
affected, but a considerable exudation of a thin, reddish, turbid 
serum was found all along the spinal cord, as also an acute inflam¬ 
mation of the meninges of that region, most prominent from the 
first to the fifth vertebrae, and gradually disappearing in both 
directions, toward the brain as well as toward the loins; a patho¬ 
logical lesion overlooked by other noted veterinarians. It may 
be they omitted to inspect the spinal cavity for the same reason I 
did, namely, that the brain looked too well to throw suspicion on 
the medulla spinalis. 
PATHOLOGY OF EQUINE SYPHILIS. 
(From the German , by Thanhoffer.) 
A synopsis of a paper read before the Illlinois State Veterinary Medical Asso¬ 
ciation by W. L. Williams. 
The spinal cord exhibits changes, varying in degrees as the dis¬ 
ease is in its first, second, or last stage of development, and also 
varying in different parts of the cord. 
One of the most constant changes consists of an engorgement 
and multiplication of the vessels of the pia-mater, thickening 
and turgidity of the pia-mater itself, and serum-infiltration into 
the sub-arachnoid and sub-dural spaces. These changes are most 
evident in the lumbo-sacral region, slowly diminishing forwards 
and finally disappearing; in some cases, in the cervical portion. 
The appearance of transverse sections of the cord is usually 
normal in the medulla and cervical region, but progressing back¬ 
wards shows more and more red, haemorrhagic spots, until in the 
region of the conus terminalis the gray substance shows a reddish- 
yellow color due to pigment-degeneration. The two sides—both 
white and gray matter, especially the latter—lose their symmetry; 
—that is, one side is larger than, or differently shaped from the 
other. 
In some sections, in place of the gray matter, we find a soft, 
pap-like mass, consisting of nerve-cell debris, while in other 
plaees, this degenerate mass has been absorbed, leaving in its 
place open cavities extending for a considerable length. 
