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A hand holding a U-shaped tuning fork.

Hand with tuning fork

A hand holding a U-shaped tuning fork.

"Hold a vibrating tuning fork over the mouth of a cylindrical jar about 10 or 18 inches deep, and notive the feebleness of the sound. Pour in water, as shown, and notive that, when the liquid reaches a certain level, the sound suddenly becomes much louder." -Avery 1895

Demonstration of Resonance Using a Tuning Fork and Water Column

"Hold a vibrating tuning fork over the mouth of a cylindrical jar about 10 or 18 inches deep, and notive…

"Lightly touch the wire at its middle point with the tip of the finger or the beard of a quill; the wire will vibrate in halves." -Avery 1895

Sound Wave

"Lightly touch the wire at its middle point with the tip of the finger or the beard of a quill; the…