CONSULTATIONS AND COMMUNICATIONS. 
497 
Edinburgh, 16th August, 1845. 
Sir, — I BEG to acknowledge the receipt of your’s of the 14th 
this morning. From the additional particulars it contains, I am 
more decidedly of opinion that there is a dilatation of the esopha- 
gus, — its situation, the form of his neck, the fact of having been 
wrought in too small a collar for a few days, the circumstance of the 
tumour totally disappearing when at work, all tend to confirm that 
opinion; the pressure of the collar, the action of the muscles of the 
neck, and the suspension of feeding for the time emptying the sack. 
The only thing that militates against that being the case is, that 
the tumour sometimes does not probably make its appearance 
till the next day after being at work, and does not do so at 
all times when he returns to the stable and begins to feed ; that, 
however, may arise from the parts, although weakened and re- 
laxed, still retaining some power of contraction, which can be 
effected when the weight is removed, by the sac being evacuated, 
but which is again overcome by the repeated distention produced 
by the morsels of food as they course along to the stomach. Hence 
the advantage of the pad I suggested. 
I have a preparation in my museum of the gullet of a mare 
which was dilated exactly in the situation of the tumour in your 
horse’s throat. The sac is of a conical form, the apex extending 
upwards, resembling in shape and size a pine-apple, the gullet above 
and below being of the natural size. Although diseases of the 
gullet in horses are rather rare, they are very common in cattle. 
I am, Sir, 
Your most obedient servant, 
William Dick. 
REMARKS ON Mr. W. A. CHERRY’S PAPER ON 
CORONITIS. 
By Thos. Wright, M.R.C.V.S., Brighton. 
It was not without some degree of interest, and, I may say, 
instruction too, that I perused the communication in your last 
number from Mr. W. A. Cherry, on Coronitis, that gentleman, I 
doubt not, having paid considerable attention to the subject on 
which he has written ; but, as I find that his opinion differs somewhat 
from mine respecting its pathological nature, &c., I have ventured 
VOL. XVIII. 3 Y 
