The London, Edinburgh and Dublin philosophical magazine and journal of science . n. The sum of the two electrifications subtractedfrom the total area of the plate, it will be seen, gives the areaof non-electrification, i. e. the intermedial space, or that partof the plate which separates the + and —, and where theelectromotive force is incapable of initiating electro-chemicalaction. These measurements are of course only relative. The following conditions were common to the severalexperiments to be described:—an electrolytic cell 120 , 128 deep and 305 long, filled to within 8 milli
The London, Edinburgh and Dublin philosophical magazine and journal of science . n. The sum of the two electrifications subtractedfrom the total area of the plate, it will be seen, gives the areaof non-electrification, i. e. the intermedial space, or that partof the plate which separates the + and —, and where theelectromotive force is incapable of initiating electro-chemicalaction. These measurements are of course only relative. The following conditions were common to the severalexperiments to be described:—an electrolytic cell 120 , 128 deep and 305 long, filled to within 8 millim. withcopper-sulphate solution; copper electrodes of the same areaas the ends of the cell ; a plate (analyzer) of fine silver,67 x 7 millim., weighing 0*75 gram, placed lengthwise mid-way between the electrodes, and between the surface of theliquid and the bottom of the cell. The time of each experi-ment was six minutes. The diagram shows the general on the Area of Electrification. 91 arrangement—B being the battery; Gt, tangent-galvanometer:R, rheostat; and S, I. Influence of Current.—In this series of experiments a5-per-cent. solution of copper sulphate was employed. Theresults obtained and the current employed are set out in thefollowing table. The numbers refer to lengths in millimetresof the several electrifications and intermedial spaces. Current in — electrifi- Intermedial + referred to amperes. cation. space. — as unity. o-i 4 nil. 0-2 13 signs at end edges. 0-4 18 30 19 1-05 06 18 18 31 1-72 0-8 16 16 35 249 10 17 12 38 2-23 1-2 18 11 38 211 1-4 19 10 38 2-00 1-6 21 8 38 1-81 1-8 22 7 38 1-72 20 23 6 38 1-65 The usual sign of + electrification was invisible on theanalyzer in the first experiment, but the — was sufficientlymarked to permit of measurement. The relation which I have already shown to exist betweenthe magnitude of the intermedial space on an analyzer andthe force required to separate an electrolyte into its consti-tuent ions (Phil. M
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
