Experiments on the Potassium Absorption of the Erythrocytes of Rana Esculentn and Rann Temporaria after Bleeding and in Hypertonic Plasma¹

Summary. It is shown that the erythrocytes of ranae esculentae and temporariae behave very much as those from pigeons. The blood taken from the neck of the frogs shows a marked, and in some cases a very rapid absorption of potassium from the plasma. If the frogs are cooled (2°) for an hour before the bleeding the erythrocytes show no spontaneous absorption. Addition of hypertonic sodium chloride solution is followed by a potassium absorption of the red blood cells.