_Treatment._—This dislocation can usually be reduced by placing the knee in front of the patient’s elbow, and making firm traction on the forearm—which is at the same time bent a little around the operator’s knee. The patient can be kept sitting in a chair while this is done, and the operator can get his knee into the required position by placing his foot on the side of the chair. _Hip-joint._—Is the most common form of dislocation. The limb is shortened, bent at the knee and twisted inwards, the great toe of the injured limb resting on the instep of foot of the opposite limb. The outer side of the hip is swollen and distorted. _Treatment._—Grasp the ankle with one hand and the knee with the other. Lift up the leg and bend it at the hip, then carry it as a whole away from the other limb as far as possible, rotate the toes and foot firmly outwards, and in that position bring the limb back parallel to the sound one. _After-treatment of Dislocations._—After dislocations, gentle movement of the joints should be begun in two weeks, so as to prevent them becoming fixed. POISONS. It is impossible, in the small space available, to give anything like a detailed scheme of the treatment of the various poisons, but a few hints on the essential points must not be omitted. I have therefore arranged a list of the commoner poisons, together with the special treatment appropriate to each. Following this are a few hints more especially adapted to the requirements of travellers. Poison should be suspected (_a_) when severe and alarming symptoms of illness suddenly attack a person apparently in good health; (_b_) if the symptoms closely follow the taking of food, drink, or medicines; (_c_) if several people are attacked after having partaken of the same food or drink. The points to be attended to in the treatment of cases of poisoning are:— _a._ Remove as much of the poison as possible from the stomach. To do this, it is usual to give an emetic, such as mustard and water, or zinc sulphate, thirty grains; or to pass the soft rubber tube down the gullet, and wash out the stomach with water. _b._ Counteract the effect of the poison by an antidote. _c._ Keep up the patient’s strength till the poison is removed from the system. _d._ Relieve pain. Travellers may be poisoned in the following ways:— 1. By poisonous bites, arrow wounds, etc. 2. By eating food poisoned by natives. 3. By eating poisonous plants, etc. 4. By eating bad meat or fish. The treatment of _snake-bites and arrow wounds_ has already been dealt with.