Copper plated octagonal equatorial dial

[Copper gold-plated octagonal equatorial public dial]

Copper gold-plated octagonal equatorial public dial, Qing Dynasty, the horizon is 7.3 cm long and 5.8 cm wide, made in France. The old collection of the Qing Palace
The instrument is divided into upper and lower layers. The upper layer is a dial. The edge of the dial is sometimes marked with Roman numerals. Each short line is a 5-minute scale. A triangular dial needle is set in the center. The dial needle can rise and fall. The dial needle is partially decorated with rolled leaf patterns. The lower layer is a horizon plate, with a compass embedded on one side and a 60 ° latitude arc on the other side, which is used to accept the dial plate. The front and back of the chassis are also engraved with the names and geographical latitude of some famous cities, such as “London 51 °” and “Rome 42 °”


铜镀金八角形赤道公晷仪局部