. The London, Edinburgh and Dublin philosophical magazine and journal of science. in the position to reflect an image ofthe discharge of the battery upon a sensitive plate. Thephotographs obtained in this way showed disruptive dis-charges superimposed upon continuous discharge. The latter,however, masked any appearance of an oscillatory was evidently necessary to blow out the flaming dischargein order to see if oscillations followed the pilot first experiment was made with 2500 cells arranged inseries ; and the flaming discharge was much lessened both bythe reduction
. The London, Edinburgh and Dublin philosophical magazine and journal of science. in the position to reflect an image ofthe discharge of the battery upon a sensitive plate. Thephotographs obtained in this way showed disruptive dis-charges superimposed upon continuous discharge. The latter,however, masked any appearance of an oscillatory was evidently necessary to blow out the flaming dischargein order to see if oscillations followed the pilot first experiment was made with 2500 cells arranged inseries ; and the flaming discharge was much lessened both bythe reduction in the number of cells and by a suitable arrange- * Communicated by tlie Author. 2G0 Prof. J. Trowbridge on the Oscillatory meut for blowing it out. On developing the photographs itwas found that the discharge was an oscillatory one, for asmany as five or six clearly defined oscillations followed thefirst, or pilot discharge. The number of cells was thendoubled, and, although more difficulty was experienced withthe flaming discharge, oscillations were again obtained. Fisr. On the supposition that each cell of the battery can beregarded as a leaking condenser, and that it is equivalent incapacity to a condenser shunted by a resistance equal to thatof the electrolyte, we can treat such a cell as a conductingcondenser under the influence during discharge of a periodiccurrent. The analysis of the well-known case is as follows:—Let ABC and AEC be two circuits*, the current ABCbeing a shunt to the circuit AEC which contains a con-denser E. Let L be the coefficient of self-induction of ABC,B, its resistance, C the capacity of the condenser in the cur-rent AEC, and r the resistance of the wires leading to the * Elements of Electricity and Magnetism, Prof. J. J. Thomson, p. 431. Discharge of a Large Accumulator. 2G1 plates of the condenser. Then if i is the current throughABC, and x the charge on the plate nearest to A, T di T,. dx x dt dt c since each of the quantities is equal
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