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
Society of Engravers were Governors. Society of Engravers The Society of Engravers was founded in London in 1802 to promote British printmaking, largely because engravers were not allowed (unless they were also painters or sculptors) to join the Royal Academy, and also to enable "each individual to act with more firmness in opposing the pretensions ... of booksellers and publishers". The first President was Francesco Bartolozzi, himself in fact an R.A.. The Royal Watercolour Society (as it later became) was founded in 1804 for similar reasons. The society is described as "short-lived". Later Presidents included William Bond, and James Parker, James Pastorini and