Square bronze diviner board and oil lamp: what they have in common

1. Step 1. Square bronze diviner board — is part of — South-pointing spoon (Chinese compass). A smooth plate marked with the cardinal directions.
2. Step 2. South-pointing spoon (Chinese compass) — evolved into — Compass. A magnetic pointer.
3. Step 3. Compass — is part of — Sailing ship. A magnetic compass.
4. Step 4. Sailing ship — has part — Anchor. An anchor.
5. Step 5. Anchor — is made of — Stone. The oldest anchors were stones with a hole.
6. Step 6. Stone — is material for — Oil lamp. The first lamps were stone bowls (Lascaux).

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