Wooden post and oil lamp: what they have in common

1. Step 1. Wooden post — is part of — Shaduf. The post is the fulcrum of the lever.
2. Step 2. Shaduf — is used in — Well. Or with a well sweep.
3. Step 3. Well — is made of — Stone. The walls of wells were lined with stone.
4. Step 4. Stone — is material for — Oil lamp. The first lamps were stone bowls (Lascaux).

Open Evothings