Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 49
coated withPbOo, while the cathode assumes a spongy metallic stateand the cell is then formed. It is important to notice, however, that secondary cellsdo not store electricity, but they accumulat^^ energy in theform of chemical Avork, and are then capable of furnishingelectrical power. The lengthy… … ^ ^ Fig. 14.—Form of Plantos original plates. current is j^assed through the cell the red lead at theanode is oxidized to PbOo, but at the cathode it is firstreduced to a lower oxide of lead (PIjO) and then to thespongy metallic condition. Accumulators may be diA^ided into tAvo classes :■ those…
Telegraph
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