The most successful treatment of this variety of insomnia is that form of medication which is addressed to the particular cause of the cachexia or dyscrasia. But the palliative treatment necessitated by the immediate suffering of the patient will often tax to the uttermost the ingenuity of the physician. Usually, there is a chronic atonic dyspepsia, or a chronic catarrhal gastro-enteritis, or a combination of both conditions, to be remedied. Gently stimulating laxatives are needed for the relief of these disorders. An animal diet is most easily digested. Milk and rare beefsteaks supply this form of nutriment, to which must be added oranges, grapes and lemons, to prevent the development of incipient scurvy. The kidneys may be excited with small doses of iodide of potassium or chlorate of potassium. Only after a considerable course of elimination are “tonics” admissible. For the immediate relief of the insomnia by which the patient is exhausted, a rather complex method is needful. Such subjects often pass the day in tolerable comfort, but, as evening advances, the wearied brain becomes irritable, and bedtime finds the patient in an excited state which cannot be easily overcome by large and repeated doses of chloral. Paraldehyde is too disagreeable to be used with impunity, and only towards morning does the sufferer yield to the narcotism induced by successive doses of chloral and bromide. A night thus occupied adds nothing to the vigor of the individual, and its frequent repetition will most surely lead to starvation of the nerve-centers,--perhaps to consequent “chloral-mania.” When the tendency to cerebral irritation becomes thus apparent, great assistance can be obtained by a resort to the use of opium, combined with tartar emetic and camphor. A pill containing one grain each of opium and camphor, with one-twelfth or one-sixteenth of a grain of tartar emetic, should be given early in the evening. This calms the brain, and prepares the way for a moderate dose of chloral at bedtime. In this way sleep can be procured with much less expenditure of nervous force and medicine than is wasted in the ordinary routine method. The rest thus obtained is followed by less depression than when it follows stupefaction with large quantities of an exciting narcotic. _Insomnia during pregnancy, and after parturition._--Closely akin to the insomnia of anæmia is the wakefulness experienced by hysterical subjects. The irritable weakness of their brains renders them peculiarly liable to disturbances of sleep. The state of pregnancy often serves to fill their nights with excitement sufficient to interfere with quiet rest. Loss of blood during parturition, by the induction of temporary anæmia, may greatly aggravate this condition.