DURING THE SCHOLASTIC SESSION OF 1836 - 7 . 117 
titioner. In process of time its vague and insignificant title will 
be abandoned, and it will be designated more in correspondence 
with its original seat and its peculiar nature. Hereafter it will no 
longer be permitted to say that it commences sometimes by a dis- 
turbance of the digestive powers, or over-fulness of the stomach, 
whether that disturbance arises in that viscus itself or in the intes- 
tines — sometimes from phlegmonous inflammation of the stomach 
alone, or combined with a similar affection of the first intestine, 
with or without disturbance of the functions of the liver — sometimes 
by direct inflammation, acute or chronic? of the meninges or of the 
brain, and with or without considerable congestion, and sometimes 
by an ataxo-adynamique essential fever, accompanied by irregula- 
rity and debility resulting from an impairment of the natural powers, 
arising from the excess of labour or the influence of cold. 
This disease presents itself under different forms in our practice, 
but the diagnosis of it is often difficult. The indications are far 
from always presenting themselves in a direct and striking manner, 
and the theory of its treatment has, consequently, no secure basis. 
There maybe organic lesions of the brain, presenting all the appear- 
ances of vertigo, and which it is impossible to recognise during life. 
At the opening of a horse that had died of this malady, after 
lifting the parietal bones at their superior part near the occipital, 
there was seen, a little to the right, a very marked thinness of that 
bone. Between this point and the meninges was a mass of cel- 
lular tissue of the volume of a pullet’s egg, thick and lamellous, and 
between the lamellae of which was deposited a substance resem- 
bling that of steatoma, and in which, when it was touched, small 
osseous laminae were recognised. Other osseous laminae were 
found in the dura-mater and the serous membrane which it covers, 
as is also observed on the external surface of old serous cysts. 
The corresponding lobe of the brain was turned downwards, and 
depressed to the extent of about two centimetres. There was a 
certain degeneracy of structure in the left division of the cerebel- 
lum. About the diseased structure on the brain, already spoken 
of, the substance of that organ was considerably softened, the 
vessels were highly injected, and, on being cut into, a considerable 
quantity of blood escaped. The lateral ventricles contained a serous 
fluid, somewhat thickened. This horse was fifteen years old ; he 
had been a good and honest worker, and had never exhibited any 
peculiar disease. 
The cerebral congestion that destroyed him commenced with a 
spasmodic stiffness of the limbs, which was mistaken for founder. 
The appetite failed. Shortly afterwards there was a great dilata- 
tion of the pupil, and, finally, giddiness and vertigo ensued. 
The Turnsick has been very prevalent this year among the sheep 
VOL. XII. Q 
