约翰·哈里森 (John Harrison) 于 1755 年 6 月 19 日向经度委员会提到的“小手表”的设计,来自约翰·哈里森 (1693-1776) 和他的儿子威廉 (c.1726-72) 汇编的一套机械笔记和图纸 (纸上笔墨)(John Harrison's design for the 'lesser watch' mentioned by him to the Board of Longitude on 19th June 1755, from a set of mechanical notes and drawings compiled by John Harrison (1693-1776) and his son William (c.1726-72) (pen & ink on paper))不明 |
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日期不详 · pen and ink on paper
· 图片ID: 978350
The Worshipful Company of Clockmakers' Collection, UK / Bridgeman Images |
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