As a general rule catarrhal croup is rarely met with after the age of six. Children in whom it occurs have either seemed quite well, or at most have been a little ailing for a day or two with cold, and cough, and perhaps slight hoarseness. They go to bed and fall asleep as usual, but the cough, which does not wake them, becomes suddenly noisy, ringing, croupy, and the breathing is speedily attended with a long-drawn sound, half-hissing, half-ringing, and the child soon wakes alarmed, and fighting for breath, the skin bathed in perspiration, the face flushed and anxious. The cough, the difficult breathing, and the struggle for air last for an hour or two, or sometimes all night long, though they gradually subside, at any rate towards the approach of morning, when the child falls asleep, and, but for a somewhat hoarse sounding cough, and a look of fatigue, there are but few signs of all that it has endured. The attack may not return, or it may recur for two or three successive nights, though in general with lessened severity, the child during the daytime seeming to suffer only from a slight cold, or now and then, and so rarely that I have not known it to occur above once or twice in all my experience, it may end in real inflammation of the windpipe; but not in diphtheria. Attacks of this kind may recur three, four, or more times even in childhood, while diphtheria has no tendency to recur, but like measles or scarlatina seldom appears more than once, though the rule is subject to more numerous exceptions than are found in the case of the eruptive fevers. Still the fact of an attack of this sort returning should of itself lessen apprehension and make the parents look forward to its issue with less anxiety than that with which they regarded its first occurrence. A fact which shows how large a part is played by disturbance of the nervous system in these cases is the liability of children who have suffered from it to attacks of asthma, often of great severity as they grow older, while very often after the transition from childhood to youth has passed these attacks too lessen in frequency and severity, and often altogether cease. There are two measures which, while waiting for the doctor's arrival, may at once be taken, and which sometimes remove the symptoms almost as if by magic, while even were the case one of diphtheria they would still be of some service, and could not possibly do any harm. They are the hot bath, and a full dose of ipecacuanha wine. The former should be as hot as it can be borne, 93 deg. or 94 deg., and the child should be kept in it for five minutes, and the latter should be given in a full dose, as a teaspoonful in warm water every quarter of an hour till free vomiting takes place. How much better soever the child may seem after the use of these remedies, it should still be kept for two or three days under careful medical observation.