point of this ring by a penknife and evacuated the fluid, and I
again applied the caustic all round in order to give firmness to the
edges of the eschar.

On the succeeding day an opening was made in the centre of the eschar
and a little more fluid was evacuated.

This mode of treatment was continued daily for about a week, the
inflammation gradually subsiding and the eschar becoming adherent and
corrugated. In about three weeks, the patient thinking the sore quite
well detached the eschar; there was still, however, a minute ulcer
left, which was touched with the caustic.

CASE XXX.

C. Cocking, aged 17, has an ulcer of the size of half-a-crown on the
inner part of the knee, occasioned by an accident. He had been a month
under surgical care in the country when he applied to me, but the
ulcer continued without disposition to heal, and fungous; it had
apparently been treated by a solution of sulphate of copper. I applied
the lunar caustic over the surface of the sore and upon the
surrounding skin.

On the following day, the eschar was unadherent and puffy, and on
piercing it a little fluid escaped. The incision into the eschar was
repeated three or four successive days, but the eschar still retained
its puffy character; I therefore directed a poultice to be applied to
remove it.

In two days the eschar was separated leaving the ulcer with its
fungous appearance. I removed the fungous part by scissors, and
directed the poultice to be applied and to be continued for two days.
I then formed another eschar. This required a daily puncture for the
evacuation of subjacent fluid, for six days; it then remained
adherent, and in about a fortnight it separated leaving the ulcerated
surface healed. This patient was not at all confined.

CASE XXXI.

Mr. S. aged 30, had a sore two inches in length in the groin, the
remains of a phagedenic ulcer. It had remained stationary a whole
fortnight under the ordinary treatment by bandage. I applied the lunar
caustic to form an eschar and then the gold-beater's skin.

The day afterwards, I found the eschar incomplete and I applied the
caustic again. The eschar was still incomplete on the following day,
and the caustic was again required to be applied to the denuded parts.

On examination two days afterwards I found the eschar complete and
adherent.

On the fourth following day, great part of the eschar had separated
leaving the ulcer healed, and I had no occasion to see the pa