Economy, value, and right apportionment of time--Laws appointed by God for the Jews--Christianity removes the restrictions laid on the Jews, but demands all our time to be devoted to our own best interests and the good of our fellow-men--Enjoyment connected with every duty--Various modes of economizing time--System and order--Uniting several objects in one employment--Odd intervals of time--Aiding others in economizing time--Economy in expenses--Contradictory notions--General principles in which all agree--Knowledge of income and expenses--Evils of want of system and forethought--Young ladies should early learn to be systematic and economical. XX. _HEALTH OF MIND._ Intimate connection between the body and mind--Brain excited by improper stimulants taken into the stomach--Mental faculties then affected--Causes of mental disease--Want of oxygenized blood--Fresh air absolutely necessary--Excessive exercise of the intellect or feelings--Such attention to religion as prevents the performance of other duties, wrong--Unusual precocity in children usually the result of a diseased brain--Idiocy often the result, or the precocious child sinks below the average of mankind--This evil yet prevalent in colleges and other seminaries--A medical man necessary in every seminary--Some pupils always needing restraint in regard to study--A third cause of mental disease, the want of appropriate exercise of the various faculties of the mind--Extract from Dr. Combe--Beneficial results of active intellectual employments--Indications of a diseased mind. XXI. _THE CARE OF INFANTS._ Herbert Spencer on the treatment of offspring--Absurdity of undertaking to rear children without any knowledge of how to do it--Foolish management of parents generally the cause of evils ascribed to Providence--Errors of management during the first two years--Food of child and of mother--Warning as to use of too much medicine--Fresh air-- Care of the skin--Dress--Sleep--Bathing--Change of air--Habits--Dangers of the teething period--Constipation--Diarrhea--Teething--How to relieve its dangers--Feverishness--Use of water. XXII. _THE MANAGEMENT OF YOUNG CHILDREN._ Physical education of children--Animal diet to be avoided for the very young--Result of treatment at Albany Orphan Asylum--Good ventilation of nurseries and schools--Moral training to consist in forming _habits_ of submission, self-denial, and benevolence-General suggestions--Extremes of sternness and laxity to be avoided--Appreciation of childish desires and feelings--Sympathy--Partaking in games and employments--Inculcation of principles preferable to multiplication of commands--Rewards rather than penalties--Severe tones of voice--Children to be kept happy--Sensitive children--Self-denial--Deceit and honesty--Immodesty and delicacy--Dreadful penalties consequent upon youthful impurities--Religious training. XXIII. _DOMESTIC AMUSEMENTS AND SOCIAL DUTIES._