Winkler investigated the analysis of gases. He published a book on the subject, Handbook of Technical Gas Analysis, in 1884. In that book Winkler describes his invention of the three-way stopcock. He predicted the existence of silicon monoxide, SiO, and was the first to attempt to produce it by heating silica with silicon in 1890. However, he was unsuccessful because he was not able to heat the mixture to a high enough temperature using a combustion furnace. As no reaction occurred for him, Winkler incorrectly concluded that SiO does not exist, even though it was reported to have formed from the reduction of silica with charcoal three years earlier by C. F. Maybery. However, Henry Noel Potter, a Westinghouse engineer, repeated Winkler's experiment fifteen years later with an electric furnace, which enabled him to increase the reaction temperature by several hundred degrees and observe the generation of SiO. See also German inventors and discoverers References Further reading – Extensive comments on Winkler from a student's point-of-view (English translation by George Lunge) External links The Clemens Winkler Medal (in German) 1838 births 1904 deaths Members of the Royal Swedish Academy of Sciences Discoverers of chemical elements People from the Kingdom of Saxony Deaths from cancer in Germany Scientists from Freiberg 19th-century German chemists Germanium