Seismograph and kiln: what they have in common

1. Step 1. Seismograph — has part — Pendulum. An inertial mass.
2. Step 2. Pendulum — is part of — Tower clock. A pendulum (since the 17th century).
3. Step 3. Tower clock — is part of — Gothic cathedral. A tower clock.
4. Step 4. Gothic cathedral — has part — Vault. Rib vaults.
5. Step 5. Vault — is made of — Brick. And of brick.
6. Step 6. Brick — uses — Kiln. Fired brick is stronger than mud brick.

Open Evothings