Page:Popular Science Monthly Volume 22.djvu/345

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TIME-KEEPING IN LONDON.
PSM V22 D345 The chronopher schematic.jpg
Fig. 7.—Diagram showing Electric Connections of the Chronopher.

current from Greenwich in no way controls the Westminster clock, hut is simply used for rating the clock hy comparison; when change of rate is necessary, weights are added or removed at the pendulum. Each of the line wires is in permanent connection with one of a set