Open-hearth furnace and glasses: what they have in common

1. Step 1. Open-hearth furnace — is part of — Steel works. A steelmaking shop.
2. Step 2. Steel works — uses — Coke. The steel works’ blast furnaces run on coke.
3. Step 3. Coke — is made of — Carbon. Coke is almost pure carbon: everything else is baked out of the coal.
4. Step 4. Carbon — is material for — Photocopier. Toner is carbon black in resin.
5. Step 5. Photocopier — has part — Lens. Optics.
6. Step 6. Lens — is part of — Glasses. Lenses.

Open Evothings