 A conservative and crude process, the use of 'beehive ovens' to produce a deposit of coke also caused the creation of by-products which proved harmful to the environment; posing another 'promising development' for Henry Simon to introduce a technological change.Visiting the Besseges works at Terrenoire along with a large party of engineers in 1878, Henry Simon saw the potential for the coke oven business in development by Francois Carves.He secured the patent rights to this innovative technology and in due course established a second firm alongside his already prosperous milling industry; Simon Carves.