PROGRESS OF VETERINARY SCIENCE AND ART. 455 
may again become capable to transmit it. Rev asserts 
having seen such cases, but St. Cyr believes that the circu- 
lation is reestablished only when a stream of blood, however 
small, still finds its way through. 
If inflammation runs higher, the obliteration is complete — 
the lymph adheres tightly to the vessel, contracts and draws 
together its parietes, till it is converted into a fibrous 
cord. 
When circumstances are still further unfavorable, the 
inflamed vein is painful, prominent, and the wound made by 
the fleam is filled with soft granulations, and iri its centre 
there exists a little aperture from which pus flows ; pressure 
on the lower part of the vein enables you to squeeze matter 
out abundantly. On introducing a probe into the fistula, 
it readily penetrates the vein, so that the pus comes from the 
vein. This is the suppurative phlebitis. 
What is the condition of the vein and its internal clot? 
Some persons believe the internal coat of the vein to be 
ulcerated — converted into a distinct pyogenic membrane. 
The clot has not been thought of. St. Cyr has very carefully 
studied this point, and in the veins he examined he found 
a yellowish layer of lymph, connected in the upper parts of 
the vein with a blood clot, which is generally free, and float- 
ing in the interior of the vessel. The lining of the vessel pre- 
serves its smoothness and usual polish — other portions of the 
lymph deposit are diffluent and soft. St. Cyr holds to the 
degeneration of this lymph, or decolorized clot into pus, or 
rather he speaks of the pus as a method of development of 
the clot, the latter possessing a certain vitality, and being in 
fact a blastema. D’Arboval, in his article on phlebitis, 
speaks of pus appearing in the centre of the clot, and not 
between the venous parietes and the clot. St. Cyr thus cannot 
claim originality in his observation, but deserves great praise 
for the manner he has availed himself of immense opportuni- 
ties at his command to study the pathological anatomy of 
inflamed veins. 
Lastly, St. Cyr tells us, that it is not always that the above 
process is observable. There may really occur ulceration of 
the wounded vein, an intra-venous granulating surface is 
formed, and constitutes a true suppurating wound. The 
ulceration always commences at the edges of the orifice of the 
injured vessel. Do these granulations spring from the 
internal lining of the vein, or from the layer of lymph next to 
it that is organized? asks St. Cyr. It is difficult to decide, 
is his answer, but he inclines to the adoption of the latter 
view. 
