Sympathetic Differential

A combination tuning fork set that allows two demonstrations. Without the weights, one fork responds to the vibrations of the other, illustrating sympathetic vibration at distances. With the weights, one fork can be tuned 1or more cps different, and both, when struck, will produce beats of startling clarity. These are extra heavy (32mm wide) chrome plated steel forks mounted in hardwood resonators. Mallet included.