query: Who made the first rubber balloon?
passage: Toy balloon
The first rubber balloons were made by Professor Michael Faraday in 1824 for use in his experiments with hydrogen at the Royal Institution in London. "The caoutchouc is exceedingly elastic", he wrote in the Quarterly Journal of Science the same year. "Bags made of it...have been expanded by having air forced into them, until the caoutchouc was quite transparent, and when expanded by hydrogen they were so light as to form balloons with considerable ascending power...." Faraday made his balloons by cutting round two sheets of rubber laid together and pressing the edges together. The tacky rubber welded automatically, and the inside of the balloon was rubbed with flour to prevent the opposing surfaces joining together.[8]
passage: Second Industrial Revolution
The vulcanization of rubber, by American Charles Goodyear and Englishman Thomas Hancock in the 1840s paved the way for a growing rubber industry, especially the manufacture of rubber tyres