A "summit conference" in the USA, 1918. From left to right: Thomas Edison (inventor of the phonograph and the incandescent lamp), Harvey Firestone Junior (pneumatics industry), John Burroughs (naturalistic poet), Henry Ford (cars) and Harvey Firestone (pneumatics and synthetic rubber). © Roger-Viollet
A "summit conference" in the USA, 1918. From left to right: Thomas Edison (inventor of the phonograph and the incandescent lamp), Harvey Firestone Junior (pneumatics industry), John Burroughs (naturalistic poet), Henry Ford (cars) and Harvey Firestone (pneumatics and synthetic rubber). © Roger-Viollet

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