Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect . eightlectureson00wall Year: 1903 136 THE SIGNS OF LIFE [lect. And yet, while we find reason to reject an appeal to water currents (or ' concentration currents'), as being the original source of electrical effects that arise or are provoked in living matter, we should be careful to remember that water currents must actually play an important, if secondary part, in the com- plicated molecular play of physiological action. Local action implies local disintegration, raised osmotic pressure, attraction o
Eight lectures on the signs Eight lectures on the signs of life from their electrical aspect . eightlectureson00wall Year: 1903 136 THE SIGNS OF LIFE [lect. And yet, while we find reason to reject an appeal to water currents (or ' concentration currents'), as being the original source of electrical effects that arise or are provoked in living matter, we should be careful to remember that water currents must actually play an important, if secondary part, in the com- plicated molecular play of physiological action. Local action implies local disintegration, raised osmotic pressure, attraction of water, and electrical current. The water current is towards the active spot; the electrical current is from that spot; we must imagine it as a kationic current. § 80. Evaporation current.—This first experiment should serve as reminder to you that gradual shiftings of the galvano- ( ) Fig. 54.—To illustrate evaporation currents. meter spot may, among other causes, be due to evaporation of water, and to capillary currents thereby produced. The circuit contains nothing but the galvanometer, and a pair of unpolaris-
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