Electrical engineering credited with establishing the term "electricity". He also designed the versorium: a device that detects the presence of statically charged objects. In 1762 Swedish professor Johan Carl Wilcke invented a device later named electrophorus that produced a static electric charge. By 1800 Alessandro Volta had developed the voltaic pile, a forerunner of the electric battery In the 19th century, research into the subject started to intensify. Notable developments in this century include the work of Georg Ohm, who in 1827 quantified the relationship between the electric current and potential difference in a conductor, of Michael Faraday (the discoverer of electromagnetic
Italian unification landscapes, rural scenes, and military life during the Italian unification. In literature, lots of works were dedicated to Risorgimento since the beginning. The most known writer of Risorgimento is Alessandro Manzoni whose works are a symbol of the Italian unification, both for its patriotic message and because of his efforts in the development of the modern, unified Italian language; he is famous for the novel "The Betrothed" (orig. Italian: "I Promessi Sposi") (1827), generally ranked among the masterpieces of world literature. Vittorio Alfieri, was the founder of a new school in the Italian drama, expressed in several occasions his suffering