Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect . eightlectureson00wall Year: 1903 ^looo voLb. Fig. 6i.—Response of an oxydised copper plate, illuminated for seven seconds at one minute intervals. A prolonged illumination was made in the middle of the series to see whether any sign of ex- penditure would be elicited. (The first deflection by ttjV's ^ol' turned into circuit exhibits signs of ordinary polarisation.) iJuLLLLLlill Before. ILLumin. Afber. Fig. 62.—Similar observation on a chlorinated silver plate. In consequence of prolonged illumina
Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect . eightlectureson00wall Year: 1903 ^looo voLb. Fig. 6i.—Response of an oxydised copper plate, illuminated for seven seconds at one minute intervals. A prolonged illumination was made in the middle of the series to see whether any sign of ex- penditure would be elicited. (The first deflection by ttjV's ^ol' turned into circuit exhibits signs of ordinary polarisation.) iJuLLLLLlill Before. ILLumin. Afber. Fig. 62.—Similar observation on a chlorinated silver plate. In consequence of prolonged illumination there is well-marked evidence of alteration. Speed of registration.—By reason of the inertia of the suspended magnets and mirror of the galvanometer, we must content ourselves with registering phenomena that are, comparatively speaking, pro- longed, or repeated at regular intervals. The method is not adapted to record phenomena that require a speed of recording surface greater than 5 mm. per second. It is best adapted to the recording of phenomena of long duration, or to reactions that are repeated
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