To _reverse_ the bandage, the thumb of the unoccupied hand is placed on the lower border of the bandage while the roller is turned over in the other, and then passed downwards to overlap and fix the previous turn evenly. At the moment of reversing, the bandage should be held _quite slack_, and not unrolled more than is necessary to make the reverse. All the reverses must be carried one above the other along the outer side of the limb, and only employed where really necessary. _Figures of 8_ are made, as their name implies, by passing the roller alternately upwards and downwards as it enwraps the limb (see fig. 1). They are adopted where the enlargement is too great and irregular for reverses to sit evenly, over the ankle and elbow joint for instance. [Illustration: Fig. 1.—Figure of 8 turn.] THE HEAD. =Bandages for the Head.=—A roller is commonly applied in three different ways to the head. 1st. For keeping simple dressings in place. _Apparatus._—1. A roller 2 inches wide, and of the usual length. 2. Some pins. A turn is first carried round the head, over the brows and below the occipital protuberance, and fastened by a pin; this being done, the roller is carried across the dressing, and getting into the line of the first turn, is passed round the head again, then across the dressing, and round the head by horizontal and oblique turns alternately, the former to fix the latter, and prevent their slipping off the dressing (see fig. 2). In the figure the oblique turns have been doubled, and would fix dressings on each side of the head. =Knotted Bandage.=—This is used when pressure on the superficial temporal artery is required. _Apparatus._—1. A roller 8 yards long, 2 inches wide, one-third being rolled into one head, the rest into another head. 2. Some lint. 3. A piece of a wine cork one-third of an inch thick. 4. Needle, thread, and pins. [Illustration: Fig. 2.—Bandage for retaining dressings in position, showing two sets of oblique turns. ] The cork is folded in a double thickness of lint; over this are placed six or eight more folds of lint of gradually increasing size, and the whole are kept in shape by a stitch passed through them and through the cork. This forms a _graduated compress_, and is then laid on the wound small end downwards.