Injury, recovery, and death, in relation to conductivity and permeability . Fig. 17.—Curves of net electricalresistance of Lanfinaria agardhiiin a solution containing NaCI of NaCl to of CaCh(uppermost curve); a solution con-taining mols NaCl to molsCa(0H)2 (middle curve) and inNaCl M (lowest curve). Allthe solutions had the conductivityof sea water. All readings weretaken at 18° C. or corrected to thistemperature. Each curve repre-sents a bingle typical experiment. Osterhout (1914, F)Osterhout (1915, D). 46 INJUEY, EECOVEEY, AND DEATH and trivalent still more s
Injury, recovery, and death, in relation to conductivity and permeability . Fig. 17.—Curves of net electricalresistance of Lanfinaria agardhiiin a solution containing NaCI of NaCl to of CaCh(uppermost curve); a solution con-taining mols NaCl to molsCa(0H)2 (middle curve) and inNaCl M (lowest curve). Allthe solutions had the conductivityof sea water. All readings weretaken at 18° C. or corrected to thistemperature. Each curve repre-sents a bingle typical experiment. Osterhout (1914, F)Osterhout (1915, D). 46 INJUEY, EECOVEEY, AND DEATH and trivalent still more so.^^ In most cases the effect is sostriking that the addition of the solid salt to the seawater, although decreasing the resistance of the solution,nevertheless increases the resistance of the living tissueso greatly that the net result is an increase in the resist-ance of the tissue plus solution. As this does not happen 110- 100- — — -iT^^r--^—. HOURS 40 Fia. 18.—Curve showing the net electrical resistance of Laminariaagardhii in eea water towhich was added sufficient cobalt chloride (in the form of dry salt) to make the M. Solution neutral to litmus. All readings were taken at 18° C. or corrected to thistemperature. The curve represents a single experiment. Dead tissue showed no rise. with dead tissue the increase must be due to an alterationin the living protoplasm.^^ It is therefore evident thatthe current must flow in part through the living proto-plasm, as well as through the cell walls. In the case of certain bivalent kations (Mn, Co, Cd, Ni, C/. Osterhout (1915, E). It might be suggested that the increase in resistance is due to a de-crease of the spaces between the protoplasmic masses brought about by anexpansion of the protoplasm or by a shrinkage of the cell wall. Micro-scopic and macroscopic examination shows that this does not occur. Thetendency is, on the other hand, to increase the spaces b
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