Acetylene of 180°. Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". It was rediscovered in 1860 by French chemist Marcellin Berthelot, who coined the name "acétylène". Berthelot's empirical formula for acetylene (CH), as well as the alternative name "quadricarbure d'hydrogène" ("hydrogen quadricarbide"), were incorrect because chemists at that time used the wrong atomic mass for carbon (6 instead of 12). Berthelot was able to prepare this gas by passing vapours of organic compounds (methanol, ethanol, etc.) through a red-hot tube and collecting the effluent. He also found that acetylene was formed by
Kirk Johnson (scientist) a master's degree in geology and paleobotany. He received his PhD in geology and paleobotany from Yale University in 1989. While in graduate school, in 1987, he discovered an extinct species of linden leaf, which was named Tilia johnsoni in his honor. His postdoctoral work included field research in the northern Australian rainforests, while he served as a postdoctoral research associate in the department of botany at the University of Adelaide. From 1991 to 2012, Johnson worked at the Denver Museum of Nature and Science, first as a lead scientist, then the chief curator and vice president of research and