英文文章中的困惑

英文文章中的困惑
The Invention of Cotton Candy
(and what is it made from?)
Cotton candy is a soft confection that look like a fluffy mass of cotton (but there is no cotton in cotton candy).Cotton candy is made from finely-granulated sugar that is heated and spun into slim threads.
Cotton candy was invented in 1897 by William Morrison and John C.Wharton,candymakers from Nashville,Tennessee,USA.They invented a device that heated sugar in a spinning bowl that had tiny holes in it.It formed a treat that they originally called "Fairy Floss." As the bowl spun around,the caramelized sugar was forced through the tiny holes,making feathery candy that melts in the mouth.
Morrison and Wharton introduced cotton candy to the world at the St.Louis World's Fair (1904) and sold huge amounts of it for 25 cents a box (that was a substantial amount of money back then).They sold about 68,655 boxes at that fair.The term "cotton candy" began to be used in the USA around 1920.In the United Kingdom,this treat is called "candy floss." （我的困惑； William Morrison and John C.Wharton,和 St.及 Louis World's Fair (1904) around表示什么意思如何译?）劳驾!