As a general rule, the joint at the lower end of the fractured bone should always be fixed, and that at the upper end also, if the fracture is near that point. For an example of the mode of fitting, let us suppose the femur is broken between the middle and lower thirds as in fig. 56. Step 1. The limb is first measured for the splints. The length from the top of the sacrum to the heel, from the tuber ischii to the inside of the foot, and from the iliac crest to the outside of the foot, should be taken, and three strips of millboard prepared of corresponding lengths; the posterior one being 3 inches wide above and 2 inches, or, if the limb is small, 1½ inches wide at the heel. The inner and outer strips of similar width must be cut with side pieces for the foot, and these side-pieces stop short of the roots of the toes. For a child’s thigh, the foot need not be included, it suffices for the splints to reach the small of the leg, though to prevent shortening in an adult it is usually necessary to include the whole limb. The splints are readily cut, by first marking on the sheet of millboard, the required width and length of the strips, then bending the sheet over the edge of a table along these lines. The two lateral splints may be first taken from the sheet in one wide strip, after allowing for the foot-piece; the two strips are separated through a diagonal line, so that the broad end of one splint is taken from the other (see fig. 55). [Illustration: Fig. 55.—Diagram showing the mode of cutting out splints from a sheet of millboard.] When the strips are cut they should be laid on a large tea-tray, boiling water poured over them, and a minute or two later, some boiling hot thin starch; this soon soaks into and softens the millboard till it is thoroughly pliant. When somewhat softened, the edges should be thinned by peeling off little strips along them, after which some more boiling water may be poured on and allowed to soak in while the limb is prepared. Two or three rollers should then be unwound, and passed as they are rolled up again through the basin of starch; these, thoroughly soaked in starch, are used for the first layer, dry rollers serve very well for the second layer. Step 2. The limb is washed and dried; a strip of diachylon plaster one inch wide is laid along the front to protect the skin when the case is being cut open after it is dry; the limb is next wrapped evenly in cotton wool, putting a scrap between each toe. This is best done by unrolling a sheet of wadding, splitting the sheet into a layer of suitable thickness, which is torn into strips about three inches broad, that are then wound evenly round the limb as high as the splints will reach.