CASE OF SCARLATINA OR PURPURA HEMORRHAGICA. 539 
and probably a layer of lymph lining their arterial coats, I do not 
think they are completely obstructed, but that the canal only is 
diminished ; and although you were unable to draw blood even with 
a scalpel, I would still hold to this opinion, because there is a strong 
tendency in the blood of cattle to coagulate. In many instances 
I have no doubt you have found a difficulty in abstracting blood, 
especially from cows, even when, on first opening the vein, the blood 
has flowed with considerable freedom ; and this difficulty you must 
have found arising from that tendency to coagulation : and, for the 
same reason, the blood of cattle, especially cows, does not shew the 
huffy coat so readily as that of horses. 
As to the mare’s case, I have no doubt the ligamentous attach- 
ment of the gastrocnemius internus to the point of the os calcis has 
been ruptured ; and you will find, when the inflammation and 
swelling have sufficiently subsided, that the tendon now passes 
down obliquely on the outside of the os calcis : it will there form a 
kind of groove for itself, and attachments will take place, so as to 
keep all right, and the mare in that way will become sound. I 
have seen several cases of that kind, and in one instance a black 
mare had this tendon in both hocks displaced, and with such slight 
alteration of structure in the surrounding parts, that I was inclined 
to think, in her case, it must have been a congenital malformation. 
It is surprising to see how completely the thickening produced 
by the inflammation subsides after the inflammation has been 
subdued. I shall be able to shew you a case of the kind in a 
mare belonging to Mr. Miller, near Portobello, when you return. 
Blisters with rest will effect a cure, but firing will be fully as 
efficacious. 
Your’s truly, 
William Dick. 
CASE OF SCARLATINA OR PURPURA HEMORRHAGICA, 
ACCOMPANIED BY GENERAL TUMEFACTION. 
By Mr. J. Woodger. 
HAVING, during the last spring and early part of this summer, 
been called upon to treat numerous cases of the above kind, 1 take 
the opportunity of forwarding the present one for insertion in your 
valuable journal. 
June 1 6th . — 6 o’clock P.M., I was called to attend a fine bay 
horse, five years old, belonging to the Hammersmith Conveyance 
Company. 
