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| The Quadrant Altazimuth 象限仪地平纬仪 was made in 1673 (Qing Dynasty) and designed for measuring altitudes or zenith distances of celestial bodies. This is one of the instruments designed by Ferdinand Verbiest. |
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http://hua.umf.maine.edu/China/beijing2.html
Last
update: May 2007
© Marilyn Shea, 2007