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Q: This interesting device seems to have an orrery inside, but looks a bit like a garden armillary sundial from the outside with all those concentric rings.
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| A: It's a Bryant Celestial Indicator -- a combination orrery and armillary sphere, made in Hartford, Connecticut, by Henry Bryant in the 1870s. The armillary sphere shows planetary orbits, the zodiac band of constellations, and terrestrial and celestial measurement circles such as the Tropics of Cancer and Capricorn and the Equator. If you look inside you can see the orrery -- all the different planets, including the earth and moon, that revolve around the central brass sun. You turn the planets by hand -- there is no gear work. |
Bryant's Celestial IndicatorClick image for full description and enlargement |
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