window-sash to allow the window to open only for a sufficient space for ventilation, and to have a screw window-fastening, in order that he cannot, without difficulty, open the window; to have a trusty person to sleep in his room, who should have directions given not to rouse him from his sleep, but to gently lead him back to his bed, which may frequently be done without awaking him; and to consult a medical man, who will adopt means to put his stomach into order, to brace his nerves, and to strengthen his general system. A trip to the coast and sea bathing, in such a case, is often of great service.
SECOND DENTITION.
195. When does a child begin to cut his SECOND set of
teeth?
Generally at seven years old. He begins to cut them at about that time; but it should be borne in mind (so wonderful are the works of God) that the second crop of teeth in embryo is actually bred and formed from the very commencement of his life, under the first tier of teeth, but which remain in abeyance for years, and do not come into play until the first teeth, having done their duty, loosen and fall out, and thus make room for the more numerous, larger, stronger, and more permanent teeth, which latter have to last for the remainder of his existence. The first set is sometimes cut with a great deal of difficulty, and produces various disease; the second, or permanent teeth, come easily, and are unaccompanied with any disorder. The following is the process: one after another of the first set gradually loosen, and either drop out, or with little pain are readily pulled out; under these, the second—the permanent teeth—make their appearance, and fill up the vacant spaces. The fang of the tooth that has
