and patented the Barsanti-Matteucci engine which was a different form of gas vacuum engine. Developed further by Otto & Langen in Germany, it was put into worldwide production (outside Germany) by Crossley of Manchester between 1867 and 1877. Examples of this form of engine can be seen working at the Anson Engine Museum. This success arose from a demonstration of the engine at the World Fair in Paris in 1867, where it was shown to be far more efficient than the current production gas engine of Lenoir which was driven by the pressure resulting from burning the gas, rather than a vacuum. The success of the vacuum engine was however short lived after the creation of engines that compressed the gas/air mixture before igniting it. See also Timeline of hydrogen technologies History of the internal combustion engine References Further reading Horst O.Hardenberg, The Middle Ages of the I.C.Engine, Warrendale, 1999, pages 97–114. External links The Rev. W. Cecil's Hydrogen Engine, 1820 English engineers 19th-century British inventors 1849 deaths 1799 births