. Electro-physiology . FIG. 114. revolving easily round the central axis, worked as uniformly as possible (5-10 revolutions per second) by clockwork, or a small motor. At the periphery of the wheel there are three isolated metal-points (according to Hermann, brushes of copper-wire), one of which (c) forms the exciting contact, the other two (</, c") effect the closure of the galvanometer circuit. The former slides at each revolution over a thin extended wire, or pool of mercury, and thus closes the circuit (R\ li") of the primary coil of an induction apparatus. The currents produc
. Electro-physiology . FIG. 114. revolving easily round the central axis, worked as uniformly as possible (5-10 revolutions per second) by clockwork, or a small motor. At the periphery of the wheel there are three isolated metal-points (according to Hermann, brushes of copper-wire), one of which (c) forms the exciting contact, the other two (</, c") effect the closure of the galvanometer circuit. The former slides at each revolution over a thin extended wire, or pool of mercury, and thus closes the circuit (R\ li") of the primary coil of an induction apparatus. The currents produced in rapid succession in the secondary coil (make and break shock) are led into the prepara- tion, and may be regarded collectively as a momentary stimulus. Diametrically opposite to the exciting contacts, isolated from the
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
