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 restraints and inhibitions, as it is to prove a simple indivisible quality transmissible intact. We are so profoundly ignorant in these matters, so far from anything worthy of the name of science, that one view is just as permissible and just as untrustworthy as the other.

Even the qualification of "health" is not sufficient. A thoughtless person may say with the most invincible air, "Parents should, at any rate, be healthy," but that alone is only a misleading vague formula for good intentions. In the first place, there is every reason to believe that transitory ill-health in the parent is of no consequence at all to the offspring. Neither does acquired constitutional ill-health necessarily transmit to a child; it may or it may not react upon the child's nutrition and training, but that is a question to consider later. It is quite conceivable, it is highly probable, that there are hereditary forms of ill-health, and that they may be eliminated from the human lot by discreet and restrained pairing, but what they are and what are the specific conditions of their control we do not know. And furthermore, we are scarcely more certain that the condition of "perfect health" in one human being is the same as the similarly named condition in another, than we are that the beauty of one type is made up of the same essential elements as the beauty of another. Health is a balance, a balance of blood against nerve, of digestion against secretion, of heart against brain. A heart of perfect health and vigour put into the body of a perfectly healthy man who is built upon a slighter scale than