Heated drying cylinders and greenhouse: what they have in common

1. Step 1. Heated drying cylinders — is part of — Paper machine. Heated cylinders dry the paper.
2. Step 2. Paper machine — is made of — Cast iron. The rolls are cast iron.
3. Step 3. Cast iron — is material for — Crystal Palace. Cast iron.
4. Step 4. Crystal Palace — was inspired by — Greenhouse. Paxton was a gardener and a builder of glasshouses.

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