Inner metal foil lining and oil lamp: what they have in common

1. Step 1. Inner metal foil lining — is part of — Leyden jar. Foil or water inside.
2. Step 2. Leyden jar — uses — Electrostatic machine. Charged by the machine.
3. Step 3. Electrostatic machine — has part — Weight plates. Counter-rotating discs with sectors.
4. Step 4. Weight plates — is part of — Dumbbell. Weights.
5. Step 5. Dumbbell — is made of — Stone. Greek halteres were stone dumbbells.
6. Step 6. Stone — is material for — Oil lamp. The first lamps were stone bowls (Lascaux).

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