A servant maid was bitten by a dog in four places--severely on the forearm--three days ago. Adhesive plaster had been applied. There is a wound across the arm two inches in length and three-fourths of an inch in breadth, attended by dull pain, and swelling of the arm. I applied the caustic to form an eschar, covering it with goldbeater's skin. On the following day the eschar remained adherent round the edges, but had a puffy feel in the centre; I pierced it with a penknife and a little bloody fluid escaped, and I touched the orifice thus made with the caustic. The swelling remained as before, with a degree of soreness. On the next day the swelling had subsided. The eschar had the same character; a little fluid was again evacuated and the caustic applied to the orifice as before. This mode of treatment was pursued for nine successive days when the eschar remained adherent in every part. This patient continued her usual avocations all along. Under any other plan of treatment I think it impossible that she should not have been compelled to rest for a number of days. Adherent eschars were formed on the other three bites which were less severe, from the first application. A very irritable sore sometimes forms after the application of leeches. I knew one lady who was confined during five weeks with several sores on her foot from such a case. I have no doubt that the application of the caustic would have prevented all the inconvenience and suffering she experienced. This observation will be confirmed by the following case. CASE XIII. Am old man applied leeches to the instep for inflammation occasioned by a bruise. Several very irritable sores were produced with some swelling. I applied the lunar caustic to form an eschar. On the following day, the eschars were adherent, the swelling had subsided, and he had slept well for the first time of several nights. I do not, however, think the lunar caustic would succeed in such cases if attended by great inflammation, without the previous application of a cold poultice with rest for a day or two. II. ON BRUISES. It has been already observed, p. 9, that the caustic is an invaluable remedy in cases of bruised wounds of the shin. In these, as in all other cases, the value of this remedy is greatly enhanced by an early application. In bruises on the shin I have not had a single instance in which I was not enabled to effect a cure by the adherent eschar, if application was made to me early. The difficulty of forming an adherent eschar is always increased by delay; but in these bruises along the shin there is an additional reason for this increased difficulty, arising out of the tendency observed in them, to the formation of a slough.