We explain these two actions, the one of body on mind, and the other of mind on body, so that care may be taken, on both sides, of the complex nature we possess. If this is done, there will be little chance of memory failing. Mind in Disease.--Often a person, because of physical failure, becomes possessed of an utterly erroneous _idea_, which no reasoning can change or remove. Indeed, reasoning in such cases is best avoided. Attention should rather be directed to the physical cause of the mental state, with a view to its removal. Very probably you will find there is want of sleep, with a dry hard state of the skin of the head, and too high an internal temperature. You may then work wonders by soaping the head (_see_ Head, Soaping). The back also should be soaped similarly. If too great a cooling effect is produced by this, wipe off the soap and rub hot olive oil on the back instead. If this is not sufficient, rub the limbs also with the hot oil. We have seen the most pronounced insanity yield to this treatment, where the cause has been _physical_ and not mental. The secret of success is in so balancing the heat and cooling applications that the utmost possible soothing can be given without any chill. Miscarriage.--An expectant mother should lead a quiet, orderly and healthful life (_see_ Child-birth). By this we do not mean laziness nor idleness, nor treating herself as an invalid. On the contrary, plenty of work, both physical and mental, and regular exercise are most beneficial, but care should be taken that work should not go the length of over-fatigue, and excitement, worry and anxiety should be carefully guarded against. The round of parties and other social functions into which many brides are drawn, frequently becomes the cause of miscarriage and other troubles. Any excitement, mental or physical, is most injurious, and the husband and wife who sacrifice present enjoyment will be richly repaid afterwards in the greater vigor and healthiness of the child; while those who live for the present will often have bitter regrets of what might have been.