Static electricity and davy lamp: what they have in common

1. Step 1. Static electricity — is used in — Electroscope. The leaves repel each other.
2. Step 2. Electroscope — is made of — Gold. With leaves of gold leaf.
3. Step 3. Gold — is material for — Fountain pen. Expensive nibs are gold: it does not corrode and flexes softly.
4. Step 4. Fountain pen — uses — Capillary action. Ink flows through the nib’s capillaries.
5. Step 5. Capillary action — is used in — Wick. Fuel rises up the wick by capillary forces.
6. Step 6. Wick — is part of — Davy lamp. A wick.

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