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...i/#1543246398059-22e86b19-662e.|url-status=dead}}</ref> In 1860, [[Belgium|Belgian]] engineer [[Etienne Lenoir|Jean Joseph Etienne Lenoir]] produced a gas-fir There are many inventions aimed at increasing the efficiency of IC engines. In general, practical eng ...

...Knowledge, and facilitating the general Introduction, of Useful Mechanical Inventions and Improvements; and for teaching, by Courses of Philosophical Lectures an ...2}</math>, arose in various works on probability and the theory of errors. Belgian sociologist and statistician [[Adolphe Quetelet]] discovered that its extre ...