conc. hemoglobin --const., conc. oxyhemoglobin which is a uniform result a t constant pressure and temperature, obtained by four different methods. I t is necessary in closing to call attention to the fact that in all experiments the gas pressures were relatively high and that under these conditions one is working in the neighborhood of maximum saturation of hemoglobin with CO or oxygen. (749) The effects of stimulation of the labyrinth of the ear in the living animal. (With demonstration.)