RT Journal T1 BErnhard naunyn (1839-1925) clinician, teacher, scientist JF JAMA JO JAMA YR 1969 FD May 19 VO 208 IS 7 SP 1182 OP 1183 DO 10.1001/jama.1969.03160070060019 UL http://dx.doi.org/10.1001/jama.1969.03160070060019 AB B. Naunyn, son of a well-to-do Berlin burgomaster, was recognized as one of the great clinical teachers and investigators of metabolic phenomena in the latter part of the 19th century.1 Sharing honors with Ehrlich as a brilliant pupil of Frerichs, Naunyn subsequently surpassed his professor in achievements attendant upon investigation in the biochemical and physiology laboratory of clinical mysteries that appeared at the bedside. In another context, Naunyn was a member of a notable cast of physicians who advanced German medicine from an 18th century discipline of natural philosophy into 19th century science, founded upon reproducible evidence gained in the experimental laboratory.Naunyn's early educational performance was not particularly brilliant. This may have been attributed to a serious illness in childhood which was identified in his autobiography as hydrocephalus.2 He did not learn to speak until the age of four and was forced to repeat several of his