Needle e electrical telegraph: o que têm em comum

1. Passo 1. Needle — faz parte de — Sewing machine. A needle with the eye near its point.
2. Passo 2. Sewing machine — inspirou — Cinematógrafo. Louis Lumière said he came up with the intermittent film feed while watching the fabric feed of a sewing machine.
3. Passo 3. Cinematógrafo — tem como parte — Lens. A lens.
4. Passo 4. Lens — é utilizado em — Optical telegraph. Signals were read through telescopes.
5. Passo 5. Optical telegraph — evoluiu para — Electrical telegraph. The electrical telegraph replaced semaphore lines.

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