A mixture containing fifteen grains of bromide of soda and five grains of antipyrine to one ounce of water is often of great value. The first dose should be given immediately the patient is in bed, and may be repeated every six hours if required. Whitla states that the best of all remedies is bromide of ammonium. It should be given in twenty-grain doses for a day or two before embarking. Morphia may be found necessary: a third of a grain may be injected under the skin of adults, but it should on no account be given to children. I have found that three or four drops of chloroform, dropped on to loaf sugar and sucked, often prevents vomiting. Those who are vomiting severely should take plenty of hot water or milk, so as to prevent them from straining on an empty stomach. Very often raisins or raisin tea can be taken when other nourishment is rejected. A recent method of treatment which has sometimes been found effective is to plug the ears firmly with cotton-wool, but this should only be done by a medical man. It is, however, worth trying. _Skin Diseases._ _Boils._—Boils are very common in the tropics and occur especially in people who have been run down. They are most frequent during or after the rains and especially in the course of hot, damp summers. In Egypt the so-called Nile boil is quite a feature of the country. In the tropics boils are often multiple and a very favourite site is the buttocks. Any part, however, which is apt to be bathed in sweat is liable to infection. A boil on the face may apparently result from the bite of a mosquito or other blood-sucking insect. _Prophylaxis._—Protect from insect bites and treat even the most trivial of skin lesions with tincture of iodine. Keep the skin clean and change the underclothing frequently. If a boil occurs cover it with a small dressing so that other parts of the skin may not be affected. A change of climate is often the only thing that will do good in the case of a person afflicted with crops of boils.