Copper plated equatorial sundial

[Copper plated equatorial sundial with longitude and latitude]

Copper plated equatorial sundial with longitude and latitude was built in the 18th century, with a height of 22cm and a bottom diameter of 18cm
This sundial has a compass in the center of its base, and an inner and outer dial on the outside, which allows you to adjust the direction of the sundial. There are two mutually perpendicular level gauges on the outside, and by rotating the three screws of the base, the level of the base can be adjusted. There are two upright rings, the inner ring being an equatorial dial, with a carved disk arranged transversely in its center. Rotate the equatorial dial so that it is parallel to the equatorial plane; Adjust the flower tray so that it is parallel to the sunlight, and the projection of the flower tray can represent the time. With the development of European clocks and timepieces, the ancient time measuring instrument has also been improved. One side of the flower plate of this instrument is perpendicular to the time plate, so it can read the time marked by Roman numerals. It is rare to incorporate new and old timing methods into one device. In addition, this sundial can also measure the height of the sun
This sundial comes from England and is a tribute from the early Qianlong period. According to the records of the Qing Dynasty, during the reign of Qianlong, Western envoys and missionaries often brought sundials to the Guangdong customs to present them to the Emperor Qianlong.