Williams, Kit -- Engines of Ingenuity

Art book by the guy who wrote Masquerade, the classic puzzle book. Remember all that marquetry in the illustrations? He's really good. This documents a working wood-and-metal model of an ancient gearwork invention: a two-wheeled chariot which contains a compass that always points north (as long as the wheels don't slip. Picture a differential, but not exactly.) Gorgeous work.

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