How Do You Make A Glass Harp?
You’ve probably run your finger around the edge of a crystal wine glass, creating a haunting musical note. You also might have noticed that if others were doing the same with their wine and water glasses, different pitches were dependent on how much water or wine was left in the glass. You also might have noticed that larger glasses produced lower tones and smaller glasses produced higher tones. This is the principal for the glass harp, sometimes referred to as the glass harmonica, invented by Benjamin Franklin. You can easily create an instrument with the same effect. Wet your finger and run it around the rim of your largest glass until you produce a sound. This may take some practice. Find the note that is closest on your tuning instrument to the note produced on the glass but a little bit lower. Put some water in the glass and check the pitch again. If the note is still too high, add more water, but if you’ve gone below the pitch of your tuning instrument, pour some of the water out
