Whitehurst & Son sundial, Bronze sundial in Derby Museum and Art Gallery, England
The horizontal sundial features a thick gnomon casting shadows on two semicircular plates separated by the style thickness for time measurement.
Created in 1812 by John Whitehurst's nephew, this precision instrument represents the continuation of a family business known for manufacturing turret clocks.
The sundial demonstrates the mathematical and astronomical knowledge required for precise timekeeping during the industrial development of Derby in the 1800s.
Visitors can observe how the device indicates both local apparent time and local mean time through specialized scales engraved on its surface.
The sundial's design achieves minute-level accuracy through equation of time correction scales, allowing users to calibrate their mechanical timepieces.
Inception: 1812
Made from material: bronze
GPS coordinates: 38.89770,-77.03650
Latest update: March 2, 2025 20:29
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