Nearer the end of the 18th century, the experiments by Henry Cavendish and Joseph Priestley further proved that air is not an element and is instead composed of several different gases.
Mendekati akhir abad ke-18, percobaan oleh Henry Cavendish dan Joseph Priestley lebih jauh membuktikan bahwa udara bukanlah unsur namun tersusun dari beberapa gas yang berbeda.