Liebig condenser and archimedes’ screw: what they have in common

1. Step 1. Liebig condenser — works like — Separate condenser. Condensing vapour by cooling.
2. Step 2. Separate condenser — uses — Latent heat. Watt drew on Black’s research on latent heat.
3. Step 3. Latent heat — is used in — Ice cream maker. Ice with salt draws away heat.
4. Step 4. Ice cream maker — has part — Crank. A handle.
5. Step 5. Crank — is part of — Archimedes’ screw. A handle or rotary drive.

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