Some biophysical experiments from fifty years ago.

Georg von Bekesy died June 13, 1972. In early March of that year, the Editors and Editorial Committee members of the Annual Review of Physiology invited him to write the prefatory chapter for this 1974 volume. He accepted promptly and added "I am sure I will have it finished long before your deadline of June 1973." He mailed us his completed manuscript three weeks later, early in April 1972, two months before his death. Professor von Bekesy received the Nobel Prize for Physiology and Medicine in 1961. In the presentation speech, Professor C. G. Bernhard of the Karolinska Institute said