Iran, comparable to barbers, bathhouse workers, fortune tellers, bricklayers, and porters. Modern era With the growth of the whaling industry in the 18th century, spermaceti, an oil that comes from a cavity in the head of the sperm whale, became a widely used substance for candle making. The spermaceti was obtained by crystallizing the oil from the sperm whale and was the first candle substance to become available in mass quantities. Like beeswax, spermaceti wax did not create a repugnant odor when burned, and produced a significantly brighter light. It was also harder than either tallow or beeswax, so it would not soften or bend in the summer heat. The first "standard candles" were made from spermaceti wax. By 1800, an even cheaper alternative was discovered. 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. Industrialization The manufacture of candles became an industrialised mass market in the mid 19th century. In 1834, Joseph Morgan, a pewterer from Manchester, England, patented a machine that revolutionised candle making. It allowed for continuous production of molded candles by using a cylinder with a moveable piston to eject candles as they solidified. This more efficient mechanized production produced about 1,500 candles per hour, (according to his patent, "with three men and five boys [the machine] will manufacture two tons of candle in twelve hours"). This allowed candles to become an easily affordable commodity for the masses. At this time, candlemakers also began to fashion wicks out of tightly braided (rather than simply twisted) strands of cotton. This technique makes wicks curl over as they burn, maintaining the height of the wick and therefore the flame. Because much of the excess wick is incinerated, these are referred to as "self-trimming" or "self-consuming" wicks. In 1848 James Young established the world's first oil refinery at the Alfreton Ironworks in Riddings, Derbyshire. Two paraffin wax candles were made from the naturally occurring paraffin wax present in the oil and these candles illuminated a lecture at the Royal Institution by Lyon Playfair. In the mid-1850s, James Young succeeded in distilling paraffin wax from coal and oil shales at Bathgate in West Lothian and developed a commercially viable method of production.