Glass harmonica Franklin and a fellow of the Royal Society, extended the experiments of Pockrich, contriving a set of glasses better tuned and easier to play. During the same decade, Christoph Willibald Gluck also attracted attention playing a similar instrument in England. Benjamin Franklin invented a radically new arrangement of the glasses in 1761 after seeing water-filled wine glasses played by Edmund Delaval at Cambridge in England in May 1761. Franklin worked with London glassblower Charles James to build one, and it had its world premiere in early 1762, played by Marianne Davies. Writing to his friend Giambatista Beccaria in Turin, Italy,
Bristol blue glass many other studio Glassmakers in the South west. Today, Bristol Blue Glass is produced by The Original Bristol Blue Glass Ltd in Brislington, established in 1988. In the 1990s, John Harvey & Sons of Bristol began to sell Bristol Cream sherry in bottles made from Bristol blue. The glass contains cobalt oxide, which creates a deep yet bright blue, and 24% lead oxide (PbO). Bristol blue glass Bristol blue glass has been made in Bristol, England, since the 18th century, with a break between the 1920s and 1980s. During the late 18th century Richard Champion, a Bristol merchant and potter,