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English

Working independently of one another, around 1730, John Hadley, an English astronomer, and Thomas Godfrey, an optician in the British colonies in America, both developed designs for an octant with a smaller graduated arc.

Chinese

大约1730年,英国天文学家约翰‧哈德利(John Hadley)与美洲英属殖民地的光学仪器商托马斯‧戈弗雷(Thomas Godfrey)各自开展研究,最后两人都研发出具有较小分度弧的八分仪。