It is important to add in this connection a word of caution against the adoption of a dietary too abstemious in character. It is necessary that an abundance of good, wholesome food, rich in the elements of nutrition, should be taken regularly. There is no doubt that many young ladies have induced conditions of serious disease by actual starvation of the system. A young woman who attempts to live on strong tea or coffee, fine-flour bread, and sweet cake, is as certainly starving herself as though she were purposely attempting to commit suicide by means of starvation, and with as much certainty of the same result. Brunettes Naturally Precocious.--It has been observed that in girls the occurrence of puberty is earlier in brunettes than in blondes; and in general it makes its appearance earlier in persons of a nervous or nervo-bilious temperament than in persons of a lymphatic temperament or phlegmatic nature. Certain nationalities and families are marked by the earlier occurrence of puberty than in others. In Jews, the change is commonly a year or two in advance of other nationalities in this country. It also occurs somewhat sooner in negroes and creoles than in white persons, the African race seeming to retain something of the precocity occasioned by the tropical influence of its native clime. Remarkable Precocity.--Cases occasionally occur in which puberty makes its appearance at the age of three or four years. Indeed, a case has been reported in this country in which a female child possessed all the characteristics which are usually developed at puberty, from birth. In this case the regular periodical changes began at birth. Premature Development Occasions Early Decay.--A fact which is of too great importance to allow to pass unnoticed, is that whatever occasions early or premature sexual development, also occasions premature decay. Females in whom puberty occurs at the age of ten or twelve, by the time their age is doubled, are shriveled and wrinkled with age. At the time when they should be in their prime of health and beauty, they are prematurely old and broken. Those women who mature late retain their beauty and their strength many years after their precocious sisters have become old, decrepit, and broken down. Thus, the matrons of thirty and forty years in colder climates are much more attractive in appearance than the maidens of sixteen; while quite the reverse is true in this and other countries where sexual development is unduly hastened. Early Puberty a Cause for Anxiety.--The unnaturally early appearance of puberty is a just cause for apprehension, since it usually indicates an inherent weakness of the constitution. When there are reasons for fearing its occurrence, active measures should be taken to occasion delay if possible. We call especial attention to this point, since there are many who erroneously suppose the early occurrence of puberty to be a sign of superior vigor.