Mechanical television and hammer: what they have in common

1. Step 1. Mechanical television — evolved into — Television. Electronic TV replaced mechanical TV.
2. Step 2. Television — uses — Radio. The image is transmitted by radio.
3. Step 3. Radio — is part of — Weather balloon. A radiosonde.
4. Step 4. Weather balloon — is made of — Vulcanized rubber. The envelope is rubber or latex.
5. Step 5. Vulcanized rubber — is material for — Reflex hammer. A rubber head.
6. Step 6. Reflex hammer — is a kind of — Hammer. A hammer.

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