Mop head and mechanical clock: what they have in common

1. Step 1. Mop head — is part of — Mop. A rag or microfibre head.
2. Step 2. Mop — is made of — Cotton. A mop is cotton strands.
3. Step 3. Cotton — is used in — Arkwright’s water frame. It spins cotton.
4. Step 4. Arkwright’s water frame — has part — Gear. Drafting rollers running at different speeds.
5. Step 5. Gear — is part of — Mechanical clock. A gear train counts seconds, minutes and hours.

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