French press and mechanical clock: what they have in common

1. Step 1. French press — has part — Piston. A plunger with a mesh.
2. Step 2. Piston — is part of — Syringe. A plunger.
3. Step 3. Syringe — is part of — IV drip. A needle.
4. Step 4. IV drip — uses — Gravity flow. The solution flows under gravity.
5. Step 5. Gravity flow — is used in — Water clock (clepsydra). Water flows out at a constant rate under gravity.
6. Step 6. Water clock (clepsydra) — evolved into — Mechanical clock. Mechanical clocks replaced water clocks, swapping the flow of water for an escapement.

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