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| The Quadrant Altazimuth. 象限仪地平纬仪 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