. Bulletin. Science. Figure 8.âFuller's trough battery, a Daniell cell battery that was used in the early days of British telegraphy. From R. Wormell, Electricity in the Service of Man, London and New York, 1886, p. 397. called the "intensity of the electrical force" (that is, the voltage) /z-fold over that produced by a single pair of electrodes, but the quantity of electricity (that is, the current) was the same whether the pile had one pair or n pairs. Davy argued that the intensity of electricity increased with the number of pairs and the quantity increased with the area of these
. Bulletin. Science. Figure 8.âFuller's trough battery, a Daniell cell battery that was used in the early days of British telegraphy. From R. Wormell, Electricity in the Service of Man, London and New York, 1886, p. 397. called the "intensity of the electrical force" (that is, the voltage) /z-fold over that produced by a single pair of electrodes, but the quantity of electricity (that is, the current) was the same whether the pile had one pair or n pairs. Davy argued that the intensity of electricity increased with the number of pairs and the quantity increased with the area of these ; In 1815 J. G. Children '' published the results of a number of experiments made to prove Davy's hypothesis. He improved the trough battery by applying a suggestion by William Wollaston to increase the area of one electrode by folding it into a L)-shape about the other (fig. 12). Two years later Hans Oersted ^^ reported he had increased the effec- tive area of a battery by replacing the wooden trough with a copper one (fig. 13). This copper trough served as one electrode; the electrodes of the other metal were placed in the trough. Such a design greatly increased the heating and sparking power of the battery. â ' Humphrey Davy, "On Some Chemical Agencies of Elec- tricity," Philosophical Transactions, 1807, vol. 97, pp. 1-56. " John G. Children, "An Account of Some Experiments with a Large Voltaic Battery," Philosophical Transactions, 1815, vol. 105, pp. 363-374. " Hans C. Oersted, "Bemerkungen hinsichtlich auf Con- tactelektrizitat," Journal Jiir Chemie und Physik (hereinafter referred to as Schweigger's Jo^/rna/), 1817, vol. 20, pp. Figure 9.âPepys' trough battery. From Plulo- sophical Magazine, 1803, vol. 15, pi. i. PAPER 28: DEVELOPMENT OF ELECTRICAL TECHNOLOGY IN THE 19TH CENTURY: I 576627â61 2 239. Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
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