Quartz glass capsule and shaduf: what they have in common

1. Step 1. Quartz glass capsule — is part of — Halogen lamp. It withstands high temperature.
2. Step 2. Halogen lamp — is a kind of — Incandescent light bulb. An incandescent lamp.
3. Step 3. Incandescent light bulb — evolved from — Oil lamp. The electric lamp replaced oil and gas lamps.
4. Step 4. Oil lamp — is made of — Stone. The first lamps were stone bowls (Lascaux).
5. Step 5. Stone — is material for — Well. The walls of wells were lined with stone.
6. Step 6. Well — uses — Shaduf. Or with a well sweep.

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