Candle and glasses: what they have in common

1. Step 1. Candle — has part — Wick. A candle’s wick.
2. Step 2. Wick — is part of — Oil lamp. The wick feeds oil to the flame.
3. Step 3. Oil lamp — is used in — Magic lantern. The light source is an oil lamp.
4. Step 4. Magic lantern — has part — Lens. Lenses.
5. Step 5. Lens — is part of — Glasses. Lenses.

Open Evothings