—L. A., aged 17. Family and past history were negative.
—Beginning in March, 1903, the patient was confined to bed for three months owing to a fever that was supposed to be typhoid, with relapse. During this illness he had very little cough or headache, but toward its termination he experienced severe pain in the left side, which lasted about a week and was made worse by cough and by deep inspiration. A week later lie noticed, for the first time, that the left side of his chest was smaller than the right. He believes that this change in his chest took place overnight, and he is very certain that it had not existed before his illness. Since this fever he has been troubled more or less with weakness and with dyspnea on exertion. He has at present no edema, cough, or pain in the side.