Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 11.] EYEBALL CURRENTS 23 flashing lights, or a succession of colours, in accordance with the accidents and irregularities of such coarse artificial disturb- ance. And no doubtâcould we only detect itâthe physico- chemical disturbance is attended by an electrical disturbance The latter will, however, be most easily demonstrated to you with an excised eyeball. 12. Demonstration.âSuch an eyeball has been removed 71 â Inductonum^' Fig. 8.âFrog's eyeball between unpolarisable electrodes for demons
Eight lectures on the signs of life from their electrical aspect eightlectureson00wall Year: 1903 11.] EYEBALL CURRENTS 23 flashing lights, or a succession of colours, in accordance with the accidents and irregularities of such coarse artificial disturb- ance. And no doubtâcould we only detect itâthe physico- chemical disturbance is attended by an electrical disturbance The latter will, however, be most easily demonstrated to you with an excised eyeball. 12. Demonstration.âSuch an eyeball has been removed 71 â Inductonum^' Fig. 8.âFrog's eyeball between unpolarisable electrodes for demonstration ot the electrical effects of light and of electrical excitation. The circuit from the eye is completed through a compensator, secondary coil, and a galvanometer. The arrows through the eyeball and the galvanometer indicate the direction of the initial current and of the normal response. Arrows near the compensator wires indicate the direction of a compensating counter-current. as carefully as possible a few moments ago from a pithed frog. 'Carefully' in this connection means with as little compression of the eyeball as possible, and in point of fact such compression
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