Unearthed objects of standard watches

During the period of 1977, archaeologists excavated a large number of precious cultural relics in the early tomb of Hou Xiahou in Ruyin, Fuyang, Anhui Province (in the fifteenth year of Wen (BC 165)), and one of the lacquerware was called "unknown lacquerware" because of its unknown function. After years of research, Shi Yunli found that this object is an ancient astronomical instrument "standard watch", which is used to measure the length of the noon sun shadow. It is the earliest existing standard watch in the world, even earlier than the standard watch unearthed in Yizheng. Different from other standard tables, the geographical latitude of this standard table is fixed. Our calculation shows that the applicable latitude of the standard table of Ruyin Hou Tomb is just in the area from Chang 'an to Ruyin Hou Guo (now Fuyang, Anhui) in Han Dynasty. Shi Yunli said that the beauty of this watch is that the positions of the four solar terms are not expressed by scales, but are hidden in some special patterns and positions on wood blocks and lacquerware.

1965, a pocket watch was unearthed from the Eastern Han Tomb atNo. kloc-0, Shibei Village, Yizheng City, Jiangsu Province. Gui is 34.5 cm long, made in Chinese 1.5 feet, with units of size engraved on the side; The height of the watch is 19.2 cm, which is 8 inches in Chinese. Guiyu and the watch are connected by a pivot, which makes them integrated. When in use, the watch stands vertically on the turtle tail; Usually, the watch can be folded into the space left in the GUI body, which is convenient to carry. It is a masterpiece of close cooperation between designers and foundries. According to tradition, the height of a watch is 8 feet; This value has been used for a long time. The height of the meter is just 8 feet110, which shows that it is a portable measuring instrument, which can prove that the observation by the permanent observatory with 8 feet at that time is credible.

Time is measured by a standard table, which lasted until the Ming and Qing Dynasties. One standard table of Nanjing Purple Mountain Observatory, in the Ming Dynasty (1437- 1442).