Hendrik Zwaardemaker



Hendrik Zwaardemaker (10 May 1857, Haarlem – September 19 1930, Utrecht?) was a Dutch scientist who invented the olfactometer in 1888.

From 1897 to 1927 he was professor of Experimental Physiology at the University of Utrecht. In addition to his work on the sense of smell, he also conducted research on the human heart. He found that salts of potassium and other radioactive elements stimulated the heart.