A strip of prepared mustard leaf, 5 inches wide by 8 inches long, should be cut, and a piece of cheese-cloth, 6 or 8 layers thick, should be folded the same size. The cheese-cloth is then wrung out of hot water, and the mustard leaf is quickly dipped into the same. The cheese-cloth is placed on the back of the neck, between it and the mustard leaf. The clothes should be kept dry by a folded napkin. In this way the mustard may be kept on from six to eight minutes, until it begins to burn and the skin get red. If left on too long, the mustard may produce the most painful kind of a blister. When taken off the neck, the mustard may be put on over the stomach. The medicinal treatment must be directed by the physician, but a perfectly safe prescription, and one which may be kept on hand, is the following: Take of sodium bromid, 15 grains; of essence of peppermint, 10 drops; and of water a sufficient quantity to make 1 dram. Mix well. The dose may be repeated in three hours if necessary. This prescription should be put up by a good druggist, in a three-ounce quantity. Sometimes relief is afforded by 1 teaspoonful of the aromatic spirits of ammonia, taken in four tablespoonfuls of water, and this is about the right quantity of water to take any liquid medicine in. At night 2 grains of calomel should be taken, so that the patient shall not be disturbed through the night, and it is not so apt to cause nausea as when taken through the day. =Neurasthenia or Nervous Prostration.=—This disease first saw light in the United States, and was christened by Beard as an American disease that was absent from no household in which the inhabitants used their brains. It is certainly much more prevalent in this than in any other country. Americans scarcely treat their bodies with more consideration than their automobiles; they put on high pressure and speed them to the utmost. Add to the high pressure under which we live that other fact of heredity, that many persons are born with unstable nerve-cells, and may be nervously bankrupt, and it is not difficult to understand that 50 per cent. of Americans are suffering in some degree from lowered nerve tone. _Causes of Neurasthenia._—All classes of men and women who use their brains severely, and who have seasons of excessive anxiety and responsibility, are subject to neurasthenia. We have seen that fatigue was caused by the accumulations of toxins in the body, due to muscular activity, but these toxins may also be caused by intellectual overwork or anxiety over domestic or business affairs.