Machine tool und electrical telegraph: was sie gemeinsam haben

1. Schritt 1. Machine tool — wird verwendet in — Interchangeable parts. Identical parts can only be made on precise machine tools.
2. Schritt 2. Interchangeable parts — funktioniert wie — Movable type. Movable type is an early case of interchangeable parts: identical letters move from line to line.
3. Schritt 3. Movable type — entwickelte sich zu — Linotype. Mechanized typesetting.
4. Schritt 4. Linotype — nutzt — Tin. A line is cast from type metal (lead, tin, antimony).
5. Schritt 5. Tin — ist Material für — Phonograph. The recording is on tin foil.
6. Schritt 6. Phonograph — wurde inspiriert von — Electrical telegraph. Edison came to the phonograph while working on recording telegraph and telephone signals.

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