Moving carriage with spindles and electric motor: what they have in common

1. Step 1. Moving carriage with spindles — is part of — Spinning mule. From the jenny.
2. Step 2. Spinning mule — evolved from — Arkwright’s water frame. A hybrid of two machines.
3. Step 3. Arkwright’s water frame — has part — Water wheel. Driven by water.
4. Step 4. Water wheel — is used in — Rolling mill. The first mills were turned by water.
5. Step 5. Rolling mill — has part — Electric motor. The drive.

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