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© Courtesy of the Institute of Chinese Studies, Library, Heidelberg University.
Article
科學小識(續), Knowledge of science
小青 Xiaoqing (Author),
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魚 Fish
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風琴管的孔 Organ's hole
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笛的孔 Flute's hole
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簫嘴的孔 Chinese flute's hole
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科學小識插圖二 The second illustration of knowledge of science