Joseph Henry did not discover oxygen. Joseph Priestley and Carl Wilhelm Scheele are the two men who independently discovered oxygen in 1774. Scheele actually discovered it first, but Priestley was the first to publish his findings. Joseph Henry is the person who discovered the electromagnetic phenomenon of self-inductance.
Oxygen
he discovered oxygen
Feather
Joseph Priestly discovered "oxygen" in 1744. He called it "dephlogisticated air."
Joseph Priestley of England discovered oxygen and Carl Scheele of Sweden they both discovered it around the same time.
Karl Scheele was the first person to discover oxygen. However, he published his findings later than Joseph Priestley.
Joseph priestly dicovered oxygen in 1774 and carl Wilhelm scheele did the same in 1772 but published his findings in 1777 three years after priestly published his findings
Joseph Black did discover carbon dioxide.
Hydrogen was discovered by Henry Cavendish, oxygen was discovered by Joseph Priestly and Carl Scheele
Joseph Henry Steele died in September 1980.
Joseph Henry (uom = Henry)
Joseph Henry Lumpkin died in 1867.