…It also explains spherical trigonometry, how to use logarithm tables, and how to find the circumference of an ellipse. Sakabe has written many books, but his other published works include Kairo Anshinroku (1817), which explains various things you need to know about sailing. He also published a single-sheet world map called Chikyu Zaizusetu (Earth's Diagram). … *Some of the terminology explanations that refer to "Kairo Anshinroku" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…その中には,球面三角法,対数表の使い方,楕円周の求め方も示されている。坂部には多くの著書があるが,刊行されたのは,ほかに《海路安心録》(1817)があり,航海に必要な種々の心得が説明されている。また,《地球略図説》なる1枚刷りの世界地図の刊行もある。… ※「《海路安心録》」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 |
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