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
Social class in 18th-century Spain Social class in 18th-century Spain The social structure of Spain in the 18th century continued to be based upon nobility and peasantry. However, the period also saw the growth of a middle class, centred upon the growing bureaucracy associated with Bourbon rule, and upon a limited development of commerce and industry. In Spain at this period there were a large number of nobles. Some of them were rich while others were poor workers. Although their number decreased during the second half of the century, they continued numerous, due in part to the large number of "hidalgos" in the north of