Night Coughs.--These frequently remain as the so-called dregs of some illness, and are found very persistent. They are also frequently very alarming, as they are thought to indicate some trouble in the lungs, and as immediate steps should be taken to check this, it is well to consult a good doctor. But, though coughing at night does of course accompany lung disease, it is by no means a chief symptom. Also, it is evident that the treatment applicable to bronchitis and other chest inflammations will often fail to relieve a night cough, because the night cough in question is due to nervous irritation or indigestion. Narcotics are useless and hurtful. Great relief is frequently found from inhaling the smoke of burning nitre or saltpetre. Blotting paper may be soaked in a solution of saltpetre, dried and lighted. Place the burning substance near enough the patient for him to inhale the smoke, but not so near as to interfere with _easy_ breathing, especially in cases where there is great weakness. When patients are fairly strong the back should be rubbed with warm olive oil for ten minutes or so in the morning before getting out of bed. Then apply a cold towel, well wrung out, folded lengthwise along the spine, and over it a dry one. Let the patient lie on this, and renew it when heated, continuing altogether for fifteen minutes or so. Give another fifteen minutes' rubbing with the hot oil before dressing. If the patient feels chilly during the cooling, foment the feet and legs at the same time. Nightmare.--In serious cases of this trouble, the patient awakes some time before he gains any power whatever to move, feeling held as in a vice. But in common instances, the attack is entirely during sleep, and accompanied by frightful dreams. A heavily-loaded stomach, pressing on the solar plexus of the nerves, is a very common cause. The burdened nerves partially cease action, and this gives rise to the trouble. Anything similarly affecting these organic nerves will cause it also; but if the stomach be at fault, reduce the food and let the last meal be light and not later than six o'clock. This followed by a cup of hot water, before going to bed, will work a perfect cure. When it is feared there may be an attack, _lying on the face_ in bed will often prevent it, even if the patient so lies for a very short time, and then turns on the side again. When students, or school children, are over-driven (_see_ Children, various articles), nightmare, very persistent, is one of the symptoms. In such cases, there is _urgent need_ of rest, or most serious consequences may follow. Treat as recommended in Depression, and if any nervous troubles show themselves, treat as in various articles on nerve affections. Bad dreams, especially with children, are a sure sign of something wrong with the health, and should always lead to investigation, that their cause may be found and removed.