Electric light by the first practical electric arc light in 1806. By the 1870s, Davy's arc lamp had been successfully commercialized, and was used to light many public spaces. The development of a steadily glowing filament suitable for interior lighting took longer, but by the early twentieth century inventors had successfully developed options, replacing the arc light with incandescents. The energy efficiency of electric lighting has increased radically since the first demonstration of arc lamps and the incandescent light bulb of the 19th century. Modern electric light sources come in a profusion of types and sizes adapted to many applications. Most modern
Royal Society of Sciences in Uppsala Royal Society of Sciences in Uppsala The Royal Society of Sciences in Uppsala (Swedish "Kungliga Vetenskaps-Societeten i Uppsala"), is the oldest of the royal academies in Sweden. The society has, by royal decree of 1906, 50 Swedish fellows and 100 foreign. Early members included Emanuel Swedenborg and Anders Celsius. The Royal Swedish Academy of Sciences was founded in Stockholm 1739, and its founders (some of which were members in Uppsala) specifically wanted an academy which was different from the Uppsala academy. The Academy was founded 1710 in Uppsala on the initiative of the university librarian Erik Benzelius (jr) (later archbishop)