Willis Whitney — John Fritz medalist

IF you should pick up a turtle five miles or so from Schenectady, N. Y., and find markings on his shell — a date and the letter W — you would note the time and place of your discovery and notify Doctor Whitney; you and the turtle then would be participating in scientific research. Down on the island of Nassau there are conch shells that show markings and pictures through their opalescent linings. They have been in Doctor Whitney´s hands and he has made these markings to study the mechanism of shell growth.