Abstract
1) At the final stadium of bleaching the yellow color exhibited by the retina or the extract of the retina of toad six hours after hepatectomy with ligation of posterior vena cava is deeper than that of the control,
2) If the retinae are turned to the dark before the yellow color has been decolorized by illumination, more visual purple regenerates in those of the toad undergoing hepatectomy with ligation of posterior vena cava than the control.
3) These phenomena occur only in medium which is slightly acid.
4) These phenomena are due to the retarded thermal decomposition of indicator yellow of the toad undergoing hepatectomy with ligation of posterior vena cava.
5) These phenomena occur in the retina of toad undergoing incomplete hepatectomy, ligation of hepatic artery, ligation of portal vein or ligation of posterior vena cava, but hepatectomy with ligation of posterior vena cava is the surest method and requires the shortest time to induce these phenomena.
6) The acid liberation of the retina is almost the same in toad undergoing hepatectomy with ligation of posterior vena cava and in normal toad.
