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This is a scientific text which discusses, as the main subject, Nitrous Oxide. There are details of much research into the gas and also details of experiments carried out using it. Sir Humphry Davy was a chemist and an inventor. In 1799 he experimented with this gas. He nicknamed it 'laughing gas' because of the sensations it gave him. He was also among the first to recognise its anesthetic properties.画面が切り替わりますので、しばらくお待ち下さい。
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