I LOVE this picture! This barometer belonged to my Grandfather, I don't know the story behind it except that my Dad said, every day his Dad would tap it. Well, I tap it everyday and was very excited to see if it would work when a hurricane came. It does slightly change when we have a storm rolling in, but WOW! did it ever work! Click on the picture so you can get a better view. Look to see where the black hand is pointing.