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Early 1900s Thermocap hair loss device looks like sci-fi medical tech gone wrong

Popkin
May 18, 2026
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Boing Boing / Google Gemini

This photo from the early 20th century shows what a hair loss treatment called the Thermocap looked like. This pseudoscientific gem was marketed towards men who were balding. The device consists of a tall metal hat that looks like something a Martian in a sci-fi cartoon would be wearing.

The metal cap used a special combination…

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