Ball and telescope: what they have in common

1. Step 1. Ball — includes — Golf ball. A ball.
2. Step 2. Golf ball — is made of — Gutta-percha. “Gutty” balls were gutta-percha.
3. Step 3. Gutta-percha — is part of — Transatlantic cable. Insulation.
4. Step 4. Transatlantic cable — is a kind of — Electrical telegraph. A telegraph line.
5. Step 5. Electrical telegraph — evolved from — Optical telegraph. The electrical telegraph replaced semaphore lines.
6. Step 6. Optical telegraph — uses — Telescope. Signals were read through a telescope.

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