“…G. V. indicates the great vessels; M. R., the distance from the midline of the heart to the most distant right border; M. L., the distance from the midline to the most distant left border, and T. H., internal diameter of the thorax. 6 Twenty-four milligrams of ephedrine twice daily has been found sufficient to prevent the mild as well as the severe seizures. At no time during the eighteen months has the patient experienced any untoward symptoms from the drug.…”