AN instrument for measuring distances on chart or maps — c’mon, I thought that was a tricky one. Turns out, not so much. A couple of dozen readers wrote in to say last week’s item was an opisometer, meilograph, chartometer, curvimeter or similar map measuring item, including Keith Brown who got in first. Bryce Atkinson, Coral Brady, Adrian Jack, Stew Edwards, Cedric Lockley, Betty Jones, Frank Weston, Gail Oakes, Adriana Beachtime, Simon Allen, Andrew Edwards, Tony Cope, Bill Godfrey, Dennis Turner and George Colebrook all also had the correct answer. You all win an imaginary What Is It? prize!