The relative share which the parents and the doctor take in the treatment of these cases depends to a great extent on their severity. While attention to the state of the bowels, and a generally tonic treatment are almost always needed, gymnastics and drill are often of very great service in the slighter cases; and a very distinguished Paris physician was accustomed to send children thus affected to march round the Place Vendome, keeping step while the band was playing. The utility of gymnastics turns very much on the degree in which the child is able by attention to control his movements, and when either as in young children fixed attention cannot be roused, or as in severe cases the effort only adds to the child's nervousness, and in consequence increases the movements, they must be given up. All drill and gymnastics are best carried out in class with other children, and regulated not simply by word of mouth, but by a tune or chant. When recovery is in progress gymnastics will then in almost all instances find their place. Even when drill and gymnastics cannot be practised, regulated movements of the limbs carried out twice a day for ten minutes at a time are of very real service. Another's will here takes the place of that of the patient, and the limbs are thus taught, though far more imperfectly, to act in concert. Two or three more cautions may still be of service. Do not keep a child out of bed, and force it to try to exert itself when the movements are very severe; continued movement, voluntary or involuntary, fatigues. Let the child lie in bed; it rests there, and the movements, which always cease during sleep, become at once greatly lessened. So important indeed is it to avoid the exhaustion caused by incessant violent movement, that in bad cases it is sometimes necessary to swathe the limbs in flannel bandages, and so to confine them to splints in order to restrain them. Next, do not become over-anxious because the child grows stupid and ceases to talk; intelligence and the power of speech will certainly come back again. And, lastly, do not be impatient and think your medical adviser incompetent because the disorder lasts so long. An average duration of seventy days implies that while sometimes it ceases sooner, in others it lasts much longer than the two weary months of watching and waiting with which in any case you must lay your account.