IN THE HEAD- OF THE SHEET. 
01 
cranium, where they ramify in the rete mirabile, from which they 
pass to form the simple trunk of the cerebral arteries, which com- 
municates with the basilar, and is distributed to the brain. As 
there exists no internal carotid, the carotid canal is wanting; the 
sulcus which is observed on the sides of the sella turcica, and 
which resembles the carotid sulcus in man, contains only the 
inferior cerebral vein, which passes from the cranium by the 
spheno-petrosal fissure. 
The ophthalm ic artery is also a branch of the internal maxillary, 
and furnishes the ethmoidal artery, and the posterior ciliary ; the 
central artery of the retina, on the contrary, arises from the trunk 
of the cerebral artery when it has passed the rete mirabile; the 
olfactory nerve also receives some very small branches from this 
vessel. The internal maxillary furnishes the inferior maxillary 
of the face, which receives the name of mental after having passed 
from the mental foramen, the superior alveolar, and the infra- 
orbitar, which gives off a pterygoid branch: it terminates in 
bifurcating into two branches, which receive the names of pte- 
rygo-palatine and spheno-palatine. 
With respect to the branches which pass off from the common 
carotid, it is necessary to be observed, that the ascending pharyn- 
geal and the occipital arise from that artery before the lingual ; 
and with respect to the superior maxillary, the first cerebral 
branch arises between the inferior maxillary and superior alveolar; 
the other cerebral arteries, and the ophthalmic, are situated be- 
tween the superior alveolar and infra-orbitar. 
Nova. Acta. Acad. Natur. Curios, tom. xiii, pars 1 — Lancet . 
THE CAUSES OF GLANDERS AND FARCY IN 
CAVALRY REGIMENTS. 
By Mm Patu, M.V., 4th Cuirassiers . 
One of the grand principles of the French school is the non- 
contagiousness of glanders ; and yet there is scarcely a cavalry 
regiment that is not annually decimated by it. It does not pre- 
vail amongst the horses of the gentleman, the farmer, or the 
coach or waggon proprietor, more than it does in England, per- 
haps not so much; but it is the pest and disgrace of the barrack 
stable. The veterinary surgeons are well instructed ; they love 
their service, and they are anxious for the honour and the effec- 
tive condition of their respective regiments; but the infirmary is 
always crowded with glandered patients. 
