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
Proceedings of the Royal Society open access (under Creative Commons license) on payment of an article processing charge. The journal started out in 1800 as the "Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London". The Royal Society published four volumes, from 1800 to 1843. Volumes 5 and 6, which appeared from 1843 to 1854, were called "Abstracts of the Papers Communicated to the Royal Society of London". Starting with volume 7, in 1854, the Proceedings first appeared under the name "Proceedings of the Royal Society of London". Publication of the proceedings in this form continued to volume 75