Electrolysis and paper machine: what they have in common

1. Step 1. Electrolysis — is used in — Hydrogen. Hydrogen is produced by electrolysis of water.
2. Step 2. Hydrogen — is used in — Airship. Zeppelins were filled with hydrogen.
3. Step 3. Airship — evolved from — Hot air balloon. A steerable balloon.
4. Step 4. Hot air balloon — is made of — Paper. It was lined with paper on the inside.
5. Step 5. Paper — uses — Paper machine. Industrial production.

Open Evothings