The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 96
to the apparatus forproducing light by electricity; and it consists in using discs ofcarbon as electrodes, in such manner that, by revolving near eacliother in the same plane or in planes at an angle to each other,they shall constantly present fresh surfaces, and, when they have isig.l THE CIVIL… … Fig. 5. Fig. 5 is an elevation of the apparatus employed in carrying outtliis part of the invention, a, a, are two electrodes of gas-retortcarbon, which are first cut into the form of discs, and then purifiedby immersion in a solution of nitric and muriatic acid for twelvehours, and afterwards in a…
Architecture · Civil engineering · Science
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