29 FIGURE X it Data from Series 2-5 normalized to the same scale. Developed tension in percent of the greatest developed tension in each experiment. 02 uptake in percent of the 02 uptake at the greatest developed tension. Numbers refer to individual experiments. Seven to fourteen are Series 2 (circled numbers = post fatigue). Fifteen to eighteen are Series 3. Nineteen to twenty-one are Series 4. Twenty-two to twenty-five are Series 5. The asterisk denotes (100% 100%) which is common to all of the experiments. The line in this figure is the line of identity (X=Y).