THE first Greek poet of whose personality we are certain, Arctinus of Lesbos (B.C. 770), sharply differentiated medicine and surgery, and held medicine responsible for the advancement of medical science. He relates how Esculapius "endowed one of his sons with nobler gifts than the other; for while to the one, Machaon, he gave skilled hands to draw out darts, -make incisions and heal sores and w...