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
HMS Dido (1836) September 1834 at Pembroke Dockyard, Wales, and launched on 13 June 1836. She was completed on 26 January 1837 at Sheerness Dockyard and commissioned on 25 October 1836. "Her crew were manning the Proa 'Jolly Batchelor', which belonged to Rajah Brooks of Sarawach, when they were attacked by two Lanoon Pirate Proas on off Datto Point on the coast of Borneo at 3 am May 1843 which ended in the blowing up of one Proa and the destruction of the crew of the other". "Dido" arrived at Auckland, New Zealand from the East Indies Station on 2 June 1847. She