Copper gold-plated compass refers to the time sundial

[The copper-plated compass refers to the time sundial]

The copper-plated compass refers to the time sundial, made in England, with a disc length of 43.2 cm and a width of 35.5 cm. The old collection of the Qing Palace
The dial is rectangular and a compass is set in the center. There are multiple circular scales outside the compass, which are the zodiac, the Roman numerals, the time line and the 360 ° of the Sunday. The micrometer outside the ring scale is opposite to the trigonometric function on the left and right, and the dial edge is engraved with a scale. Spectacles are attached on both sides of the disc
This instrument is a multifunctional scientific and technological instrument once popular in the West before the 18th century, with the inscription “S. Saunders LONDINI fecit” engraved on the plate. With this instrument, the time and distance can be measured


铜镀金定南针指时刻日晷仪晷盘铜镀金定南针指时刻日晷仪盘面铭文