Colza oil, derived from Brassica campestris, and a similar oil derived from rapeseed, yielded candles that produce clear, smokeless flames. The French chemists Michel Eugène Chevreul (1786–1889) and Joseph-Louis Gay-Lussac (1778–1850) patented stearin in 1825. Like tallow, this was derived from animals, but had no glycerine content.