Demonstrating the Violet Ray to prospective buyers. "Rogers' Violet Ray" (Rogers Electric Labs, ca. 1910), ephemera collection. Courtesy of the Bakken Library and Museum of Electricity in Life, Minneapolis.

From The body electric: how strange machines built the modern American by Carolyn Thomas de la Peña

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Demonstrating the Violet Ray to prospective buyers. "Rogers' Violet Ray" (Rogers Electric Labs, ca. 1910), ephemera collection. Courtesy of the Bakken Library and Museum of Electricity in Life, Minneapolis.
  • Fig. 20. Demonstrating the Violet Ray to prospective buyers. "Rogers' Violet Ray" (Rogers Electric Labs, ca. 1910), ephemera collection. Courtesy of the Bakken Library and Museum of Electricity in Life, Minneapolis.