[FN#23] In some infants a rash always precedes the cutting a tooth. Sometimes it appears in the form of hard elevated pimples as large as peas; in other instances in the form of red patches, of the size of a shilling, upon the arms, shoulders, and back of the neck. They are always harmless, require no particular attention, and prevent, I doubt not, more serious complaints. SECT. II. HINTS UPON THE PERMANENT OR ADULT TEETH. Parents are not sufficiently alive to the importance of attending to the condition of the mouth of their children at the period of changing the first for the second set of teeth; they do not seem to be aware how much the comfort, appearance, and future health of the child depends upon it. Nor do they subsequently impress upon the minds of their children how necessary, on their part, is the observance of certain rules for the preservation of the teeth, and how distressing are the effects which result from their neglect. It is proposed, here, to say a few words for the information and guidance of the parent upon this subject. THE MANNER IN WHICH THEY APPEAR. The change of the temporary for the permanent or adult teeth commences, in the majority of instances, at about seven years of age; occasionally it occurs as early as five, and as late as eight years and a half. The necessity which exists for this change, and the mode by which it is effected, are striking and beautiful; it is, however, not our object to enter fully upon its consideration here. It has already been observed, that the infant is born with the rudiments of two sets of teeth in the jaw, although neither make their appearance till long after birth. The time when, and the manner in which the first set appear has been pointed out. Now although these admirably answer the purposes for which they were given up to the seventh year, after this period they fail to do so: they are not sufficiently numerous,--in their structure they are not strong or durable,--nor is their power of mastication sufficiently great.