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children and of her own health bring to her a thousand subjects of perplexity, to the close of her career, when her children, assuming their positions as men and women, look to her as their natural counsellor.
It may be said, at first sight, that in these things it is not so much knowledge as common sense and earnestness that is wanted; that as health is the natural condition, it will be secured by simply using our judgment in not positively disregarding what our natural instincts teach us in regard to our lives. This would be true if civilization were a simple state directed by instinct; but every advance in social progress removes us more and more from the guidance of instinct, obliging us to depend upon reason for the assurance that our habits are really agreeable to the laws of health, and compelling us to guard against the sacrifice of our physical or moral nature while pursuing the ends of civilization.
From the fact, then, that our lives must be directed more by reason than instinct, arises at once the necessity for a science of health, and that comprehension of it which will lead to its daily application. Take in illustration the simplest physical need, that which is most completely instinctive in its character—the question of food. Animals make no mistake on this point, being governed infallibly by instinct, but what conflicting theories it has given rise to among men! It is very rare to find among women, the heads of families, any clear idea of what are the requisites for a healthy table; and what is true of this very simple material want is still more so with regard to higher questions of physical law, those more intimately connected with the intellect and affections, and the family and social relations growing out of them. Nothing is more striking in a wide observation of daily life than the utter insufficiency of simple common sense to secure wise action in these matters. Numbers of people, of very good common sense in other things, violate the fundamental laws of health without knowing it; and when they think upon the subject they
