Abstract
1. A new micro-lass electrode for 0.07cc. material was designed. Method of the pH determination with it was described in details.
2. This micro-electrode was applied to the measurement of the blood pH, and it was found that it gave a correct value within 0.02 pH.
3. In experiments on rabbits loosely fixed on a board and on resting human adults, it was confirmed by direct measurement that the pH of arterial blood is more alkaline by 0.03 pH on an average than that of venous blood, while the former coincides with the pH of cutaneous capillary blood within the scope of experimental error.
The expenses of this research were defrayed by a grant from the Hattori-Hoko-Kwai. to whom my thanks are due.
