Dr. Earle Reynolds, an anthropologist from Yellow Springs, Ohio, is making a family affair of his boyhood dream of sailing around the world. The doctor, his wife and their two children, Ted, 17, and Jessica, 11, are shown here on arrival in Sydney, Australia after sailing 16,000 miles in the last 18 months. Dr. Reynolds, a member of the Atomic Bomb Casualty Commission in Hiroshima, and family started out from Japan in their specially built ketch, sailed first to Hawaii, then south to Samoa, New Zealand and Australia. They should reach the U.S. by way of South Africa next spring. "One advantage of a trip of this kind," says Mrs. Reynolds, "is that I don't have to worry about teaching Jessica geography."