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This intermittent current is sent to an amplifier, relayed thence to a line of electromagnets, each of which controls a needle in the loom.

The chemical action that takes place is therefore very small, as the intermittent current sent out from the transmitter in some cases only lasts from 1/50th to 1/100th a second.

Diagram showing effects of capacity on an intermittent current 5 2.

The effect of capacity upon an intermittent current is clearly shown in Fig.

The function of the transmitter is therefore to send to the relay R an intermittent current of varying duration.