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Attributed to the English mathematician William Oughtred around 1600, the universal ring dial was widely used as a portable timepiece. |
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Universal Ring
Dial
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©
2000 The Computing History Museum, The American University,
Washington
D.C. 20016
For informational questions plese, contact the curator. For technichal issues, please contact the administrator.
For informational questions plese, contact the curator. For technichal issues, please contact the administrator.