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under certain conditions of resonance

Fig. 1 (cropped to square)
The discharge from a large number of Planté cells is characterized by a sibilant flame... On developing the photographs it was found that the discharge was an oscillatory one.
ex John Trowbridge (1843-1923 *). “The Oscillatory discharge of a large Accumulator.”
The American Journal of Science 114 (September 1897) : 194-196
Harvard copy, digitized July 12, 2007

This common belief, however, must be modified under certain conditions of resonance. In general nature avoids a unidirectional discharge.

29 May 2015

discharges; nature avoids a unidirectional discharge; oscillations; resonance; sibilant flame
J. Trowbridge