Tone holes and Babbage’s Analytical Engine: what they have in common

1. Step 1. Tone holes — is part of — Flute. They change the length of the sounding air column.
2. Step 2. Flute — uses — Resonance. Resonance of the air column.
3. Step 3. Resonance — is used in — Quartz clock. Resonance of the crystal.
4. Step 4. Quartz clock — evolved from — Pendulum clock. Quartz replaced the pendulum as the frequency standard.
5. Step 5. Pendulum clock — has part — Gear. A wheel train.
6. Step 6. Gear — is part of — Babbage’s Analytical Engine. Gears performed the calculations.

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