Resonant Tuning Fork Pair on Pine Boxes with Mass and Mallet, 440Hz cylinder Six standardized objects mounted in

Six standardized objects mounted in 2 x 2 inch plastic frames

Flexible spine model demonstrates vertebral movement

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

Low-noise 220V blower with a detachable 60-inch hose and adjustable flow control

Fitted with a wide-grip handle and tapered pouring spout

Resonant Tuning Fork Pair on Pine Boxes with Mass and Mallet, 440Hz cylinder Six standardized objects mounted inUsed to demonstrate beat frequencies and sympathetic resonance, this pair of 440Hz steel forks sits on pine resonance boxes (7. 5 x 4 x 2. 5 inches) with one fork carrying an adjustable tuning mass.