The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 386
the method usuahy adopted by japanner*. ELECTRIC LIGHT. Thomas Wright, of Coopers-hill, Thames Ditton, Surrey, Esq.,for Improvements in apparatus for the production and diffusion ofWgA^—GrMted Ma.ch 9; Enrolled Sept. 9, 1845. This invention consists in producing a permanent light, by present-ing… … of wood, or other non-conductor of electricity, with five (or more)discs b, c, d, e,f, turning on axes with bearings attached to the framea. The discs consist of two circular plates of brass, or other metal,with a disc of plumbago or carbon (the latter being preferred), be-tween them, somewhat…
Architecture · Civil engineering · Science
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