Bra and optical telegraph: what they have in common

1. Step 1. Bra — has part — Cups. Cups.
2. Step 2. Cups — is part of — Anemometer. Hemispherical cups turned by the wind.
3. Step 3. Anemometer — is part of — Weather station. An anemometer.
4. Step 4. Weather station — is used in — Weather forecast. Observations.
5. Step 5. Weather forecast — uses — Electrical telegraph. Collecting reports by telegraph.
6. Step 6. Electrical telegraph — evolved from — Optical telegraph. The electrical telegraph replaced semaphore lines.

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