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 Victoria Royal Society of Victoria The Royal Society of Victoria (RSV) is the oldest learned society in the state of Victoria in Australia. The Society was formed in 1854 as The Philosophical Institute of Victoria from a merger between "The Philosophical Society of Victoria" (inaugural president Captain Andrew Clarke) and "The Victorian Institute for the Advancement of Science" (inaugural president Justice Sir Redmond Barry), both founded independently earlier in 1854 and found to be serving similar aims and membership. The Philosophical Institute received Royal Charter in 1859, and the first president of the freshly renamed Royal Society of Victoria was Dr