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John Isaac Hawkins, the inventor of trifocal lenses, coined the term bifocals in 1824 and credited Benjamin Franklin. [ citation needed ] In 1955, Irving Rips of Younger Optics created the first seamless or "invisible" bifocal, a precursor to progressive lenses . [ 4 ]
Benjamin Franklin's father, Josiah Franklin, was a tallow chandler, soaper, and candlemaker. Josiah Franklin was born at Ecton, Northamptonshire , England, on December 23, 1657, the son of Thomas Franklin, a blacksmith and farmer, and his wife, Jane White.
The glasses may either be struck with a dampened stick to produce a percussive sound, or a player may moisten their fingers and rub the rims of the glasses to produce a sound. Robert Tiso playing a glass harp: Glass harmonica (glass armonica, glass harmonium, bowl organ, hydrocrystalophone) 1763, Benjamin Franklin [12]
("Performance Review," season 2, episode 8) ... Yes, Dwight, that is the real Ben Franklin. NBC. ... With a pair of $4 drugstore glasses, $7 for the rest of the ensemble, a calculator watch, and ...
A glass harp, an ancestor of the glass armonica, being played in Rome.The rims of wine glasses filled with water are rubbed by the player's fingers to create the notes.. The name "glass harmonica" (also "glass armonica", "glassharmonica"; harmonica de verre, harmonica de Franklin, armonica de verre, or just harmonica in French; Glasharmonika in German; harmonica in Dutch) refers today to any ...
Franklin's electrostatic machine on display at the Franklin Institute. Franklin's electrostatic machine is a high-voltage static electricity-generating device used by Benjamin Franklin in the mid-18th century for research into electrical phenomena.
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