In this paper we present the clinical history of a case of myotonia congenita together with a metabolic study of the patient. The clinical side of the disease has been well summarized and the literature reviewed by Hale White.1 Therefore we shall comment only on those features of the condition brought out by our metabolism study.
II. CLINICAL HISTORY OF CASE
—G. M., Austrian, male, single, aged 22, was admitted to the medical service of St. Francis Hospital, Aug. 12, 1912, complaining of stiffness and cramps in the muscles on first attempting movements.
—The present condition was first noticed by the patient at the age of 12 while a student at the gymnasium. At that time he became conscious of a stiffness about the knees and legs, and found that he could not take so active a part in the games as