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One of the most interesting subjects of discussion in industry and manufactures which has arisen in recent years is the question of human efficiency. In the effort to increase the output in the various trades and crafts a special study of the movements required for various accomplishments has been made. It was shown, for instance, that a bricklayer at work stooped many times a day in order to pick up the bricks. In doing so, each time he stooped he had to support, under varying conditions, the weight of his body and to lift at least one-half of it to' the erect posture. On the other hand, it was shown that a good deal of this crude labor with the consequent exhaustion of muscular energy, might be saved by having the bricks so placed that he could reach them without stooping, and that this might be accomplished by means of
MUSCULAR EFFICIENCY AND PAIN. JAMA. 1911;LVI(12):898. doi:10.1001/jama.1911.02560120038018
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