Kangxi was an enthusiastic scientist. 20041Held in the Palace Museum from October 27th to May 27th 10. Emperor Kangxi exhibition? On display at the Palace of Versailles in France. There are many scientific instruments used by Kangxi in the exhibits, which can still operate normally for a long time and attract attention. There is a hand-cranked computer that can perform addition, subtraction, multiplication, division and square root operations. In fact, there are ten similar computers in the Forbidden City in Beijing. Also on display is a copper-plated scale, which can be used to calculate the square root. There are dozens of geometric models such as cones and polyhedrons made of nanmu, which were used by Kangxi when he studied geometry. It is said that Kangxi learned everything from astronomy and geography to physical chemistry, even advanced mathematics and western music, and he learned it well.
? Kangxi was not only satisfied with book knowledge. Bai Jin, one of Kangxi's teachers and a French missionary: He sometimes used quadrant to observe the height of the sun meridian, and sometimes used astronomical rings to determine the time, and then inferred the height of the local pole from these observations; Sometimes calculate the height of a pagoda and a mountain peak; Sometimes the distance between two places is measured. In addition, he often lets people carry the sundial and find out the length of the shadow of the sundial needle at noon on a certain day through personal calculation. ?
Kangxi also set up a laboratory in the palace, trial-produced drugs, experimented with maids' bodies and learned to vaccinate. Because Kangxi loved science too much, he respected teachers and attached great importance to teaching, and foreign priests were also very good. He warmly invited them to come to China, stay in China, have food and shelter, go out for inspection, take them to chat in the tent, and eat meat at the same table.