Now the principal symptoms are: vomiting, constipation, slow pulse, irregular abrupt breathing, increased temperature of the skin, contracted abdomen, headache, great excitement alternating with drowsiness, beginning decrease of reason, and deranged ability of moving the limbs. As regards _vomiting_, this is almost a continuous symptom and generally appears in the earlier stages. But the duration of vomiting is very different. Some children vomit only for one or more days and not all they have eaten, while others vomit continuously from the beginning of the disease till they are relieved by death, and no food can be found that is not thrown up shortly after its being eaten. In this connection it is a peculiar fact that vomiting will not recur if it has once ceased for twenty-four hours. Very important for the recognition of the disease is the manner of vomiting. For a child suffering from a spoiled stomach will be troubled with nausea, belching, choking and cold sweat long before it is forced to vomit, while children with acute hydrocephalus will throw up without any previous symptoms of that kind, just as though they filled the mouth with water and spit it out again. Vomiting is facilitated when children are raised or placed on their side. It ceases for the time the stomach is empty, but as soon as fluid or even solid food is taken in it will be cast out at once without causing any particular distress or inconvenience to the child. Gall is very rarely mixed with the vomit. A second and nearly as constant a symptom is _constipation_ from which nearly three-fourths of the diseased children suffer. As a rule cathartics have no effect and are generally thrown out through the mouth. This constipation will not last till the end, for a few pappy stools appear later on whether purgatives are administered or not. Violent diarrhoea resulting from intestinal tuberculosis may be discontinued at the beginning of acute hydrocephalus. But the later stools will again be thin and of cadaverous odor. During the latter stages of the disease children will often _fail to pass urine_ for twenty-four hours, so that the physician is obliged to draw it off with a catheter. The appetite does not disappear entirely as a rule. There may not be any desire for food, but generally little difficulty is experienced in inducing children to take milk or broth, which is all the more surprising as vomiting regularly follows. The _fever_ is generally not very intense. The temperature of the head, especially the forehead, is considerably increased in all cases and remains so until death ensues, while the feet have great tendency to getting cold.