Clay and saw: what they have in common

1. Step 1. Clay — is material for — Spindle. The spindle whorl was shaped from clay or carved from stone.
2. Step 2. Spindle — evolved into — Spinning wheel. A wheel turns the spindle.
3. Step 3. Spinning wheel — has part — Crank. A foot drive through a crank.
4. Step 4. Crank — is part of — Sawmill. A crank turns the wheel’s rotation into the stroke of the saw.
5. Step 5. Sawmill — uses — Saw. The cutting tool is a saw.

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