Second. When the gums are very red and hot and swollen; only in this case the gum is scratched or cut, to bleed it, not with the idea of letting out the imprisoned tooth. Third. When the child has for some week or two been feverish and suffering; while, though the gum is tense and swollen, the tooth does not seem to advance. Fourth. As an experiment, when during the progress of teething a child is suddenly seized with convulsions for which there is no obvious cause. The irritation of the teeth may have to do with their occurrence; and the chance of relieving it by so simple a means is not to be thrown away. If the process of teething is going on quite naturally, no interference, medical or other, is either necessary or proper. The special liability of children to illness at this time must indeed be borne in mind, and care must be taken not to make any alteration in the infant's food while it is actually cutting its teeth, but rather to choose the opportunity of some one of those pauses to which reference has been made, as occurring between the dates of appearance of the successive teeth, for making any such change. If the child is feverish, a little soda or seltzer water sweetened and given after the effervescence has subsided will be taken eagerly, and avoid the risk of putting the child too often to the breast, or giving it food too frequently. It seeks the one or the other because it is thirsty, and craves for moisture to relieve its hot mouth; not because it is hungry and needs nourishment. If the child has been weaned, still greater care will be required, for it will often be found that it is no longer able to digest its ordinary food, which either is at once rejected by the stomach, or else passes through the intestines undigested. Very thin arrowroot made with water, with the addition of one third of milk, will suit in many cases, or equal parts of milk and water with isinglass, or equal parts of milk and the white decoction. The bowels of course must be kept open with very simple and mild aperients, but the bowels are in general more inclined to diarrh[oe]a than to constipation, and the diarrh[oe]a of teething children is often troublesome and requires good medical advice.