Glass harmonica by rubbing glass or crystal goblets or bowls. The alternate instrument consisting of a set of wine glasses (usually tuned with water) is generally known in English as "musical glasses" or the "glass harp". When Benjamin Franklin invented his mechanical version of the instrument in 1761, he called it the armonica, based on the Italian word "armonia", which means "harmony". The unrelated free-reed wind instrument aeolina, today called the "harmonica", was not invented until 1821, sixty years later. The word "hydrodaktulopsychicharmonica" is also recorded, composed of Greek roots to mean something like "harmonica to produce music for the soul by
Paris in the 18th century Concorde. An attempt was also made in the late 18th century to improve the quality of street lighting. In 1669, under Louis XIV, the city was already lit with three thousand oil lamps, suspended in the middle of the street at a height of twenty feet, with twenty feet between each lantern, but not every street was lit, and the light was usually very dim; those going out at night or to the theater were usually obliged to hire a lantern-bearer to light their way until the end of the century. Between 1745 and 1769, the old lanterns were gradually