“…Rabinowitch (8) studied the vital capacity of the lungs in a series of patients with thyrotoxicosis and observed that it became lower as the basal metabolic rate increased. McKinlay (9) likewise found a reduction in the vital capacity of the lungs to below 70 per cent of the normal in a great majority of severely toxic cases of thyroid disease. He observed that the minute volume of pulmonary ventilation at rest was not related to the diminution in the vital capaciy of the lungs.…”