[Copper plated folding square]
Copper plated folding square, clear, 17 cm long, 2 cm wide, 0.5 cm thick, made in Paris, France. The old collection of the Qing Palace
“Moment” is a two-arm ruler for carpenters to measure right angles. It is an important measuring tool in ancient China. Before the Han Dynasty, the two arms of the moment were equal in length and without scale, while after the Han Dynasty, the two arms of the moment were longer and shorter in length and with scale
The square ruler is widely used in the world. This square ruler was brought into the Qing Palace by western missionaries. There is a scale on the edge of the ruler, and the two sides are engraved with French characters, such as “Made in Paris” and the name “Butterfield”.
![图片[1]-Copper plated folding square-China Archive](https://chinaarchive.net/Qing dynasty/Clockwork instrument/23784[1024].jpg)
![图片[2]-Copper plated folding square-China Archive](https://chinaarchive.net/Qing dynasty/Clockwork instrument/23785[1024].jpg "铜镀金折叠矩尺打开状")
铜镀金折叠矩尺打开状
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![[Qing Dynasty] British female painter—Elizabeth Keith, using woodblock prints to record China from the late Qing Dynasty to the early Republic of China—1915-China Archive](https://chinaarchive.net/wp-content/uploads/2022/11/image-191x300.png)
