《Circular reasoning》 - Enrikatsujutsu

...It is famous for having many difficult problems. Uchida spread the research of various cycloids, and compiled the constant volume table, or circle table, given to him by Wada Yasushi into "Enrikatsujutsu" (Enrikatsujutsu), which he gave to his disciples. After the Meiji Restoration, he joined the Astrological Science Bureau and worked on compiling almanacs. ...

*Some of the terminology explanations that refer to "Enrikyojutsu" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…難問が多いので有名である。内田は種々のサイクロイドの研究を広め，和田寧から授けられた定積表，すなわち円理表を《円理豁術（えんりかつじゆつ）》にまとめ，弟子に授けた。明治維新後は星学局に入り，編暦の仕事に従事した。…

※「《円理豁術》」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報