Caduceus as a symbol of medicine worth noting that hospital stewards were not physicians; they played a supporting role preparing drugs for surgeons, supervising nurses and cooks, maintaining accounting and medical records, and in emergencies sometimes performed minor surgery or provided prescriptions. Later, in 1871, the Surgeon General designated the caduceus as the seal of the Marine Hospital Service (destined to become the U.S. Public Health Service in 1912). Gershen states that the change was for aesthetic reasons, whereas Friedlander states the caduceus was adopted by the Marine Hospital Service "because of its relationship with merchant seamen and the maritime industry". The caduceus was formally adopted
Caduceus as a symbol of medicine of which was the caduceus. The Guildhall Museum in London holds a 3rd-century oculist's seal with caduceus symbols both top and bottom. The seal was apparently used to mark preparations of eye medicine. It is believed likely that rather than being evidence of a medical association "per se", this is rather an allusion to the words of the Greek poet Homer who described the caduceus as "possessing the ability to charm the eyes of men", which relates to the business of an oculist. Walter Friedlander proposed that early association of the caduceus with medicine might have derived from the association