Longcase equation regulator, ca. 1752, French, Oak veneered with satinwood and kingwood; gilt-bronze mounts, glass, enamel, steel, and brass, Overall: 86 1/4 × 24 13/16 × 11 13/16 in. (219 × 63 × 30 cm), Horology, Clockmaker: Ferdinand Berthoud (French, 1727–1807), Case maker: Balthazar Lieutaud (French, ca. 1720–1780), French clocks with long pendulums and weights are called régulateurs (regulators). This clock, presented in April 1752 to the Royal Academy of Sciences in Paris, appears to be the first equation clock by Berthoud, who came to specialize in timekeepers showing both solar time, which varies slightly according to the season, and mean solar time, which is stable throughout the year
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Longcase equation regulator, ca, 1752, French, Oak veneered, satinwood, kingwood, gilt-bronze mounts, glass, enamel, steel, brass, Overall, 86 1/4, 24 13/16, 11, 219, 63, 30 cm, Horology, Clockmaker: Ferdinand Berthoud, 1727–1807, Case maker: Balthazar Lieutaud, ca., 1720–1780, French clocks, long pendulums, weights, régulateurs, regulators, clock, presented, April 1752, Royal Academy, Sciences, Paris, first equation, Berthoud, came, specialize, timekeepers showing, solar time, varies slightly, according, season, mean solar, time, stable, year
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