TWENTY-FIVE YEARS AGO Yes, 25 years ago, there was a not unusual baseball picture - the YANKEES were playing in the World Series against the New York Giants. New York was also in the midst of hectic preparations for its World's Fair and Grover Whalen points out highlights of the great exposition to visiting dignitaries. Highways were crowded then and a helicopter with folding blades was designed to fly to an airport and then complete its journey to the city streets. The Germans came up with a switch on the tandem bike - on this one, boy and girl rode side by side on one set of wheels and hoped they could get their books to balance.