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Troughton & Simms was a British instrument-making firm, formed when Edward Troughton in his old age took on William Simms as a partner in 1826. It became a limited company in 1915〔()〕 and in 1922 it merged with T. Cooke & Sons to form Cooke, Troughton & Simms. The firm produced hundreds of astronomical instruments such as mural circles, transit circles, sextants, and other astronomical instruments for observatories around the world.〔King, Henry C., (1955/2003). ''The History of the Telescope''. Cambridge, Massachusetts: Sky Publishing Corporation. Retrieved from Google Books in 2009: (The History of the Telescope, by Henry C. King, page 234-6 )〕 Previously, Troughton had been a sole proprietor, and before that he was in partnership with his brother John. John died and Edward took on Simms in 1826. Edward Troughton died in 1835.〔 ==Notes== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Troughton & Simms」の詳細全文を読む スポンサード リンク
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