Abstract
The resp. metabolism of the stimulated frog''s sartorius muscle was detd. by a modification of the Dixon-Keilin method. The R. Q. averaged 0.90 with variations from 0.86 to 0.98 in the bicarbonate buffered solutions. The oxygen consumed per gm. of muscle per hr. averaged 357 mm.3 and the tension developed gave an average value of 195 kgm. per gm. of muscle per hr. A graphic summary is given of the oxygen consumed and the tension developed in 35 expts. for the frog''s sartorius stimulated under aerobic conditions. A straight line relationship holds throughout the range of these expts.

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