Excerpt from On the Source of Muscular Power: Arguments and Conclusions Drawn From Observations Upon the Human Subjects, Under Rest of Rest and of Muscular Exercise
At the present time, there are few questions relating to physiology, of greater interest and importance than the one which is the subject of this essay. Since the publication of the experiments of Tick and Wislicenus, in 1866, a large number of observations have been made, which are brought forward as evidence that the muscular system of a fully-developed man or other animal is simply a perfected mechanical apparatus, like an artificially-constructed machine, which accomplishes work, not at the expense of its own substance, the material consumed being restored by food, but by using the food itself, the force-value of which can be accurately calculated, as we can calculate the dynamic value of the fuel consumed in a steam-engine.
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