100 
BURSATIE. 
over the face, and looked like so many pimples with their 
summits more or less scabbed, situated on a reddish-purple 
base. The appearances are quite different to those of 
bursatie. The aggregation of lupus tubercles frequently 
assumes an annular disposition, but bursatie is never seen in 
the form of an aggregation of tubercles; they are, as a rule, 
large, flat, and developed in one plate. I have in a few in¬ 
stances seen outlying, small nodular bodies surrounding the 
main tumour, but these are not separate developments, as in 
lupus; they are outgrowths or offshoots from the main 
tumour. The lupus tubercles show a preference for the face, 
and will defy the best of treatment, and may exist for years, 
or even life, in one position. Bursatie ulceration also is 
commonly seen on the face; I have already said why, and 
shall again have to allude to this as being due to a special 
cause. Bursatie ulceration will occur on the face and 
heals, and reappear on one of the hind fetlocks in less than 
six weeks, and in this respect alone- the disease is totally 
unlike “lupus.” In lupus one crop of tubercles may occur, 
and, after a variable period of time, may be followed by a 
second crop; the first crop, perhaps, by this time will have 
disappeared or subsided. 
Mr. E.Wilson says that the process by which subsidence and 
disappearance of the tubercles is effected seems to be one of 
absorption, for there is no ulceration, and yet the tubercles 
leave cicatrized pits behind them. In bursatie the subsidence 
of a tumour is not the result of absorption, for so long as 
the skin covering the tumour remains in an unbroken, un¬ 
cracked, and unabraded state, the tumour continues almost 
in statu quo; but as soon as the skin becomes cracked or 
abraded a discharge immediately ensues. The loss of 
continuity of the skin is generally seen at the upper part 
first, and in this case the upper part of the sore will be 
the first to show signs of repair on the margin, and as 
the tumour matter wastes and becomes removed, its 
removal is closely followed by the cicatrising act; this is in¬ 
dicated by the appearance of a tissue of a pinky-white colour. 
The tubercular matter is got rid of by a species of running- 
out process, which, as quickly as it is effected, is followed by 
the healing of the sore. It would seem from this that the air, 
on coming in contact with the tubercular matter, causes it to 
degenerate; for so long as the tumour remains covered with 
skin no discharge takes place, but when deprived of this 
covering it immediately begins to break up, and disappears 
in the form of a dirty-yellow brown pus-like matter, not un- 
frequently tinged with blood, and somewhat like the matter 
