FRACTURE OF THE NECK OF THE THIGH BONE. 611 
behind him; he would be so suddenly attacked, and would then 
violently plunge across the road, against any thing that happened 
to come in his way. He was a beautiful horse to ride, and he 
never shewed the least indication of the disorder with saddle. He 
was, in consequence, sold to a gentleman of this parish, exclusively 
for saddle purposes ; since which he is dead, and I have his 
skeleton now by me. 
A gentleman, in this street, possesses a horse who exhibits 
symptoms of the affection precisely analogous to the last mentioned 
case. He never falls ; sometimes shakes his head rather furiously, 
and if he is only pulled up for a short time, the uneasiness all 
passes off. He has never shewn the disease while ridden. 
If I have made it appear that the collar is the principal cause of 
megrims, it is well known that many cases occur quite independent 
of this cause ; but when the collar does prove the cause, how does 
it act to do so 1 My views are, that the continued pressure upon the 
jugular veins partially obstructs the passage of blood through them, 
and that thereby the venous blood becomes confined too long in 
the brain, and probably the arterial ramifications become gorged in 
consequence. In all probability there is, in many cases, some de- 
rangement, either structurally or functionally, of that organ, which 
we are little acquainted with. I will not further trespass upon 
your valuable time by my crude remarks ; and therefore, permit 
me to remain, dear Sir, 
Your’s respectfully and obediently. 
P.S. — I should take it as a favour to be obliged with your 
opinion on the above. 
FRACTURE OF THE NECK OF THE THIGH BONE. 
By W. Younghusband, V.S., Grey stoke. 
Mr. Editor. — I THIS time presume to forward you two cases of 
what I believe to be in the animal kind a rather uncommon oc- 
currence ; and that is , fracture of the neck of the thigh hone. 
The first CASE was a small pony, aged, belonging to a widow, 
that was found to be lame in the off hind limb or quarter . Cause 
obscure. It took place out of my circuit; but through the advice 
of a medical gentleman, a friend of mine, from whom I have at 
times received some useful information, my opinion was required. 
On viewing the patient at a short distance, and having her passed 
slowly before me — I say, from this simple superficial examination, 
