White's Pulley

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“Features six movable pulleys aligned on the same axis. This pulley was invented to reduce the friction of each block to a single wheel.” —Quackenbos 1859




G. P. Quackenbos A.M. A Natural Philosophy: Embracing the Most Recent Discoveries in the Various Branches of Physics, and Exhibiting the Application of Scientific Principles in Every-day Life (New York: D. Appleton and Company, 1859) 109


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