Vacuum gap between glass walls and archimedes’ screw: what they have in common

1. Step 1. Vacuum gap between glass walls — is part of — Dewar flask. It does not conduct heat.
2. Step 2. Dewar flask — uses — Vacuum. A vacuum.
3. Step 3. Vacuum — is used in — Newcomen engine. Condensing the steam creates a vacuum under the piston.
4. Step 4. Newcomen engine — evolved into — Watt steam engine. Watt improved Newcomen’s engine.
5. Step 5. Watt steam engine — has part — Crank. The stroke of the piston becomes rotation of a shaft (Watt first used a planetary gear).
6. Step 6. Crank — is part of — Archimedes’ screw. A handle or rotary drive.

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