Myothermic methods

The recent development of galvanometers has led to substantial improvements in the technique of recording and analyzing the heat production of muscle, particularly in facilitating the correlation in time and magnitude between thermal and mechanical events. The heat changes can be resolved in time to within a few milliseconds; the changes of length or tension, recorded simultaneously, are practically unaffected by friction or inertia. The physical properties of the instruments, and numerical methods of analysis, are discussed.