25th anniversary of death - Austria / II. Republic of Austria 1954 - 1.50 Shilling

Carl Auer Ritter von Welsbach was born on September 1, 1858, the son of the then director of the Hof- und Staatsdruckerei in Vienna. The basis for his life's work was the study in Heidelberg, where he attended lectures in organic chemistry, theoretical chemistry, history of chemistry, physics and mineralogy and received his doctorate on May 2, 1882 to the doctor of philosophy. His first success was the invention of gasglass light, which he patented in 1885. Other important inventions were the osmium lamp and the Auermetall, in whose development he emanated from the property of Selbstentzündlichkeit solid body. In 1903 he applied for a patent for his "pyrophoric" metal alloys. Auer von Welsbach, the great researcher, inventor and industrialist, received numerous honors. So the emperor raised him in 1901 in the hereditary barons. The universities of Graz and Freiburg, the technical colleges in Vienna, Graz and Karlsruhe awarded him honorary doctorates, and the University of Heidelberg named him honorary senator. The brilliant scientist died on 4 August 1929.