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An advertisement for Goodyear rubber tyres from 1920. Vulcanised rubber was invented by Charles Goodyear (1800-60) in the United States in 1839 and patented in 1844. Rubber had long been used for its flexibility and softness but Goodyear devised a way to increase its resistance to low and high temperatures by heating the rubber and adding sulphur. Vulcanised rubber was used to produce life jackets, erasers, balls, and hard-wearing tyres amongst many other items still manufactured today.
Page 94 of The Saturday Evening Post, November 6, 1920, University of Illinois Library.