thumb|A ''ch'ŭgugi at Jang Yeong-sil Science Garden in [[Busan]] '''Ch'ŭgugi''' () were rain gauges invented and used during the Joseon dynasty of Korea. They were invented and supplied to each provincial office during the reign of King Sejong the Great. As of 2010, only one ch'ŭgugi remains, known as the Geumyeong Cheugugi (), which literally means "ch'ŭgugi'' installed on the provincial office's yard." It is designated as National Treasure #561 of Korea and was installed in the provincial office of Gongju city, 1837 by King Yeongjo. In addition, the official measure of rainfall by ''ch'ŭgugi
thumb|A ''ch'ŭgugi at Jang Yeong-sil Science Garden in [[Busan]] '''Ch'ŭgugi''' () were rain gauges invented and used during the Joseon dynasty of Korea. They were invented and supplied to each provincial office during the reign of King Sejong the Great. As of 2010, only one ch'ŭgugi remains, known as the Geumyeong Cheugugi (), which literally means "ch'ŭgugi'' installed on the provincial office's yard." It is designated as National Treasure #561 of Korea and was installed in the provincial office of Gongju city, 1837 by King Yeongjo. In addition, the official measure of rainfall by ''ch'ŭgugi'' from King Jeongjo's reign to Emperor Gojong's reign is preserved.
== Intention == Early in the Joseon dynasty, a system was introduced to measure and report regional rainfall for the sake of agriculture. However, the method to measure rainfall in those days was primitive, recording the depth of rain water in puddles.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).