The temperance advocate would assume that this was owing entirely to the deleterious effects of alcohol, and that is partially true; but there is a deeper reason in the difference of the two classes of men. The man in whom the appetites are well controlled by the higher energies of his nature, and who has therefore no inclination to gluttony or drunkenness, has a better organization for health and longevity than he in whom the appetites have greater relative power, and who seeks the stimulus of alcohol to relieve his nervous depression. The inability or unwillingness to live without stimulation is a mark of weakness, which is an impairment of health; and this weakness predisposes to excessive and irregular indulgence, though it may not go so far as intoxication. The effects of marriage furnish a parallel illustration. It is well-known that bachelors are more short lived than married men, but this is not owing _entirely_ to the hygienic influence of marriage. It is partly owing to the inferiority of bachelors as a class. The men who remain celibate are either too inferior personally to win the regard of women, or are generally deficient in the strong affections which seek a conjugal life, and the energies which make them fearless of its responsibilities and burdens. Evidently they have not as a class the robust energies of the marrying men, and the urgent motives to compel them to regular industry and prudence. Everything which stimulates men to exercise the nobler qualities of their nature is promotive of health and longevity; and the _true_ religion which anthropology commends will increase human longevity in proportion as it prevails. In future numbers the true basis and indications of longevity in man will be fully illustrated. The attainable limits of human longevity are generally underrated by the medical profession and by popular opinion. Instead of the Scriptural limit of threescore and ten I would estimate twice that amount, or 140 years, as the ideal age of healthy longevity, when mankind shall have been bred and trained with the same wise energy that has been expended on horses and cattle. Of the present scrub race, a very large number ought never to have been born, and ought not to be allowed to transmit their physical and moral deficiencies to posterity.