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 1 or more cps different, and both, when struck, will produce beats of startling clarity. These are extra heavy 32mm wide chromium-plated steel 440Hz tuning forks mounted on hardwood resonance boxes. Rubber ball mallet included.