Various problems associated with convalescence have attracted interest ever since ancient times (25). The present century has brought investigations into e. g. the metabolism in typhoid fever convalescents (as), the liver function post-This study was aided by the Swedish National Association Against Tuberculosis. Grateful acknowledgement is also made to Docents T. Sjostrand, S. R. Kjellberg and H. Linderholm for their suggestions and advice; and to Dr. Chr. Hedman for his interpreting of the roentgenograms.