Stephen Hill says: A glass harp (also spelled glasharfe in German.) The glasses are tuned with
water. Blocks underneath adjust the
height to level them up for easier
playing. Rubber bands or straps hold
them to the baseboard so they don't
Stephen Hill says: Glass harmonica as played in Ben
Franklin's time. His instruments used
leaded glass. Modern versions use pure
quartz crystal glass. The gold stripes
mark notes like the black keys of the
For more information and links see this site of a pioneering manufacturer.
Stephen Hill says: A real Ben Franklin Glass Armonica (or
Harmonica). Franklin saw a demonstration
of the "glass harp" in Europe,
and invented a better way to do it. His
version allows the player to sound
multiple notes at once, vs. just one or
two with wine glasses, and creates an
almost keyboard-like density of notes.
Later versions of this design use an
electric motor to rotate the spindle,
rather than a treadle and flywheel.