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      Scientific American April 04, 1914

      Man as a Source of Mechanical Power

      His Efficiency in Different Attitudes and With Varying Loads

      • By A. Lanick on April 4, 1914

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      More in the April 04, 1914 issue of Scientific American
      • The Light that Fails
      • Antarctic Problems
      • Rust-Proofing Iron and Steel Articles
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