. Eight lectures on the signs of life from their electrical aspect . 90 14100 FlG. 57 A. Compensator to deliver nrihnrth, nsVijth, or volt from a Leclanche cell (of volt). oth of a The comparison between experimental deflections and the standard deflection of known external voltage is not calculated to give the absolute value of internal of active tissue. The external circuit and galvanometer receive only a fraction of the total internal electromotive difference, which produces current partly through the internal conducting tissues, partly through the external (galvanometric) arc.
. Eight lectures on the signs of life from their electrical aspect . 90 14100 FlG. 57 A. Compensator to deliver nrihnrth, nsVijth, or volt from a Leclanche cell (of volt). oth of a The comparison between experimental deflections and the standard deflection of known external voltage is not calculated to give the absolute value of internal of active tissue. The external circuit and galvanometer receive only a fraction of the total internal electromotive difference, which produces current partly through the internal conducting tissues, partly through the external (galvanometric) arc. Moreover, the time- relations of physiological action are generally such that internal effects of brief duration produce small external effects that cannot be standardised by a prolonged external voltage. Thus, , a nervous impulse with a duration of say sec. might, on a given instrument, produce the same deflection as a constant current from an of volt, but this would not indicate electromotive value of the nervous impulse. A closer approximation would be arrived at by making the comparison with
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