Immobilisation is a more difficult problem. In practised hands plaster-of-Paris splints answer most requirements except in the case of the thigh; but the splints take time to apply and also to set firmly, and, as sometimes needing frequent removal, are not altogether suitable for Field hospital work. Of all the splints I saw in use, I think the best were wire splints, and the Dutch cane folding splints for the thigh and leg (figs. 56, 58); wire-gauze splints with steel at the margins (fig. 54), or strips of ordinary cardboard applied with some variety of adhesive bandage for the arm and forearm; and plain wooden of various lengths for any situation. A question of constant difficulty was that of frequency of dressing; in a Stationary or Base hospital this is not difficult, as the same surgeon has the patient continuously under his charge, and can readily decide as to the proper moment for the renewal of the dressing. When the patient is, however, being moved from the Field to the Stationary hospital, and thence to the Base, a constant succession of surgeons has the case in hand for short periods, the movements during transport disturb the fixity of the dressing, and, in consequence, dressings are apt to be far more frequent than is advisable. This question raises the larger one of the advisability of _any_ transport beyond what may be an actual necessity. There is only one answer to this. No fractures of the thigh or leg, and few of the arm, can be transported for any distance without material disadvantage. The risks attendant on disturbance of the fracture and tissue injury, septic infection as a result of slipping of the dressing and the impracticability of efficiently renewing it, far more than counterbalance any advantage to be gained from the superior comforts available at a Base hospital. For these reasons, if possible, all fractures of the arm, thigh, or leg should be kept at a Stationary hospital for a period of three or more weeks, and, as far as splints and appliances are concerned, these should be as numerous and complete as at a Base hospital. I have had a useful set made of aluminium. A word will be added later as to the splints suitable for different regions of the body.