Some surgeons leave these dressings for several days. I have found it an advantage to remove them within thirty-six hours, as sometimes the grafts appear to be macerated in the fluids and to lose their first cohesion to the prepared surface. The main thing about the dressing is that it should be non-adhesive and restful. After three or four days, when the grafts have completely adhered, any ointment dressing may be used. It may happen that only a portion of the entire number of grafts serve their purpose, and that others fail to do their work. Even when the failure has been apparently considerable it will often be seen that individual epithelial cells have adhered and later will grow. The unhealed portions of such a surface now fall within the definition given earlier of an ulcer, and should be subjected to the same treatment. Grafting may be repeated as often as seems to be necessary. The best surfaces from which to take the grafts are usually the outer aspects of the arms and thighs. The places from which they are removed need only the simplest antiseptic dressings. If the grafts have been of sufficient thinness the scars left by their removal are scarcely permanent and rarely disfiguring. Wight, of Brooklyn, has suggested that advantage be taken of the properties of high-frequency discharges from a suitable apparatus to secure their hemostatic and coagulant effect. He has shown that such electrical discharge will clot blood and coagulate albumin, this effect being partly due to the formation of nitric acid from the air. In this way it is theoretically possible to so seal the surfaces as to fix grafts firmly in place. The apparatus calls for a pointed electrode, passed at a distance of about 1 Cm. above the entire surface, until the clot is firm and reasonably dry, all serum that is expressed in the process being removed with sponges. Where the apparatus can be employed this affords an effective way of fixing the grafts and preventing their displacement. Surface epithelium from an animal source may be used when necessary--as from a young pig after it has left the packing-house, a young calf, or some smaller animal. All that is required is _epithelium_. That from a negro will reproduce only pigmented cells like the original. At the time when amputating a limb about which there is still left healthy unbroken skin, shavings may be removed from it and preserved for a week or two between dry sterilized towels or in a weak antiseptic solution; these may then be utilized for skin grafting during the ensuing few days. [Illustration: FIG. 30 Figure-of-8 bandage of leg.] [Illustration: FIG. 31 Velpeau’s bandage.] [Illustration: FIG. 32 Ascending spica bandage of the groin.] BANDAGING. Bandaging is a subject now taught so generally by actual demonstration, and so simplified, that it scarcely seems necessary to more than present a few illustrations showing how simple bandages can be applied in the most effective manner.