Lateen sail and saw: what they have in common

1. Step 1. Lateen sail — is a kind of — Sail. A kind of sail.
2. Step 2. Sail — is part of — Windmill. A windmill’s sails are cloths on rotating arms.
3. Step 3. Windmill — works like — Watermill. The same mill, but with a different source of energy.
4. Step 4. Watermill — has part — Water wheel. A water wheel drives the mill’s mechanism.
5. Step 5. Water wheel — is part of — Sawmill. Early sawmills were driven by water wheels.
6. Step 6. Sawmill — uses — Saw. The cutting tool is a saw.

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