Anchor escapement and archimedes’ screw: what they have in common

1. Step 1. Anchor escapement — is part of — Pendulum clock. An anchor escapement.
2. Step 2. Pendulum clock — has part — Gear. A wheel train.
3. Step 3. Gear — is part of — Sakia. A gear drive from the animal to the wheel.
4. Step 4. Sakia — is used in — Irrigation. Sakias in Egypt and India.
5. Step 5. Irrigation — uses — Archimedes’ screw. The Archimedes’ screw lifted water for irrigation.

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