Minutes of proceedings of the Royal Artillery Institution (1858)
Great Britain. Army. Royal Artillery Institution · Woolwich, Eng., : The Institution · leaf 41
t the spots formed by the spark burning away the carbon may be easily distinguished from the white specks of dust which settle on the cylinders. The paper should then be thinly, but evenly, covered with lamp-black, by holding the cylinders either over a smoky lamp or piece of burning camphor, and… … instrument, which are in connection with the cylinders ; connect up the battery with the coil, and the screens with the primary wire of the same, in the manner shown in the sketch, so that the current shall take the following course — viz., from one pole of the battery (a) round the coil to binding…
Artillery -- Periodicals · Artillery -- Great Britain -- Periodicals
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