Weather station and pneumatic tube: what they have in common

1. Step 1. Weather station — has part — Barometer. A barometer.
2. Step 2. Barometer — uses — Vacuum. The Torricellian vacuum above the mercury.
3. Step 3. Vacuum — is used in — Hyperloop (concept). A vacuum in the tube.
4. Step 4. Hyperloop (concept) — was inspired by — Pneumatic tube. Capsules in a tube — pneumatic post for people.

Open Evothings