Ice cellar pit and piston pump: what they have in common

1. Step 1. Ice cellar pit — is part of — Ice house. A sunken room.
2. Step 2. Ice house — uses — Latent heat. Melting ice absorbs heat.
3. Step 3. Latent heat — is used in — Boiler. Evaporation needs latent heat.
4. Step 4. Boiler — is part of — Newcomen engine. Steam from the boiler.
5. Step 5. Newcomen engine — has part — Piston pump. The beam drove a mine pump.

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