Sound intervals recorded by vibrating tuning forks at different frequencies. Sound and music. 1892.
Sound intervals recorded by vibrating tuning forks at different frequencies. Sound and music. 1892.

Sound intervals recorded by vibrating tuning forks at different frequencies. Sound and music. 1892.

Source: https://archive.org/stream/soundmusicx00zahm#page/421/mode/thumb

Travess Smalley

Source: tumblr_p2x8q6dWXB1tn7avwo1_1280.png
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