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公元1807年,在俄罗斯首都的彼得堡科学院的一次学术討論会上,有一位当时担任科学院的亚洲語文教授、名字叫做朱利思·克拉普洛特的德国学者,宣讀了一篇論文,題为:“八世纪时中国人的化学知識”。这篇論文引起了在座的科学家們的兴趣,后来就刊登在“彼得堡科学院院刊”上。論文为什么会引起这么大的注意呢?因为它談到化学史上的一个重大的問題——氧气的发現。作者的結論是中国的学者在八世纪时已經发現氧气,并已提出了制备氧气的方法;因而把人类发現氧气的历史提早了一千多年。
In 1807 AD, at a symposium at the Academy of Sciences in the Russian capital, a German scholar of the Asian Academy of Sciences, then the Academy of Sciences, named Julius Crapollet, read a paper titled “ Chinese Chemical Knowledge in the Eighth Century. ” This essay aroused the interest of the scientists present here and later appeared in the journal of the Academy of Sciences in Petersburg. Why did the essay attract so much attention because it talked about one of the major problems in chemistry - the discovery of oxygen. The authors conclude that Chinese scholars discovered oxygen during the 8th century and had come up with a method of making oxygen; thus, the history of human discovery of oxygen was advanced by more than a thousand years.