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Since many inventions are developed independently by more than one person, it is possible that the invention of bifocals may have been such a case. [3] John Isaac Hawkins, the inventor of trifocal lenses, coined the term bifocals in 1824 and credited Benjamin Franklin. [citation needed]
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.
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 ...
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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]
No, it was not started to help farmers, and Benjamin Franklin did not invent it. Brush up on the real history of daylight saving time before we fall back Nov. 3
The first half of the 18th century saw British optician Edward Scarlett perfect temple eyeglasses which would rest on the nose and the ears. The innovations presented by Scarlett would not only spark some to look at aesthetic customization of eyewear for fashion within Europe but also lead Benjamin Franklin to invent bifocals in colonial America. [12]
Benjamin Franklin used Wistar's glass for some of his electrical experiments. [35] After Caspar Wistar died in 1752, his son Richard led the glass works. The business continued to grow for about two more years before it began to have problems keeping workers, which led to problems with glass quality. [37]