Clockmaker : Charles Hour
A very rare late-Victorian gilt-bronze four-glass terrestrial globe clock retailed by both Charles Hour and John Wanamaker with the globe by Maison Delamarche. The stately gilt-bronze case has reeded columns to the corners, beveled glasses to all sides and is surmounted by the globe mechanism.
The clock is designed to demonstrate the equation of time – the difference between mean time and solar time. The sun is represented by the gilt piece secured to the equatorial ring. As the clock runs it indicates mean time, but the globe does not consistently rotate on its axis 360 degrees in exactly 24 hours. Instead, it rotates at the solar rate for the day of the year indicated on the scale below. The comparison of the globes position to the time below demonstrates the Equation of Time. Since it is also a 24 hour dial, the equatorial ring also illustrates world time.
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