. The evolution of forces . ow theirdirection. Fig. 7 shows the lines of force radiatinground an insulated electrified body. Fig. 8 showsthe repulsion of the lines of force between two bodiesbearing electric charges of the same sign. Of what are the lines of force composed ? Maxwellconsidered them to be formed of ether cells, whirlinground lines serving as axes. Between them wouldexist the particles which constitute electricity. Noexperiment allows us to verify this theory. Wemust confine ourselves to noting the action of linesof force without being able to say anything regardingtheir structur
. The evolution of forces . ow theirdirection. Fig. 7 shows the lines of force radiatinground an insulated electrified body. Fig. 8 showsthe repulsion of the lines of force between two bodiesbearing electric charges of the same sign. Of what are the lines of force composed ? Maxwellconsidered them to be formed of ether cells, whirlinground lines serving as axes. Between them wouldexist the particles which constitute electricity. Noexperiment allows us to verify this theory. Wemust confine ourselves to noting the action of linesof force without being able to say anything regardingtheir structure. They possess properties showingthat they are produced in the ether rather than inthe matter whence they appear to issue. 1- That lines of force also appear between conductors carryingan electrostatic charge can be shown by interposing between thema glass vessel filled with oil of turpentine and crystals of quininesulphate. See Kolbes Introduction to the Science of Electricity,English edition, 1908, pp. 125 ct. seq.— Fig. 7. Photograph of lines of force surrounding an insulatedelectrified hody. To face imge 136. i
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