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LABORATORY EQUIPMENT

Joseph Priestley

Read and translate the text with vocabulary

A very famous British scientist of the18th century was Dr Joseph Priestley (1733-1804). He was a minister in the government but won a high reputation for his scientific work. One day in 1774 he was experimenting with a large burning-glass which had just been presented to him. Among the substances he heated with it was the red oxide of mercury. He knew that this oxide would be made by heating mercury, so it is not likely that he expected to obtain anything from further heating of the oxide, but if this was so, then he must have been very surprised. The oxide, after darkening in colour, eventually turned into mercury again, and a gas was given off. Priestley tested this gas and found that it would: a) allow substances to burn in it much more brilliantly than in air; b) support life. He was puzzled as to its nature, but as substances burned in it more brightly than in air he considered it to be a purer form of air. It was, in fact, the gas we now call oxygen.


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    LABORATORY EQUIPMENT Joseph Priestley Read and translate the text with vocabulary A very famous British scientist of the18th century was Dr Joseph Priestley (1733-1804). He was a minister in the government but won a high reputation for his scientific work. One day in 1774 he was experimenting with a large burning-glass which had just been presented to him. Among the substances he heated with it was the red oxide of mercury. He knew that this oxide would be made by heating... [читать подробенее]