Greenhouse and jacquard loom: what they have in common

1. Step 1. Greenhouse — has part — Window glass. It lets light in and holds heat.
2. Step 2. Window glass — uses — Casting. The panes were cast in moulds.
3. Step 3. Casting — is used in — Linotype. It casts a line of type in metal.
4. Step 4. Linotype — evolved from — Movable type. Mechanized typesetting.
5. Step 5. Movable type — is part of — Gutenberg printing press. Text is set from metal type.
6. Step 6. Gutenberg printing press — works like — Jacquard loom. An analogy, not proven influence: both set type and a chain of punched cards are a replaceable pattern that a machine reproduces over and over.

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