First Kind of Lever
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“In straight levers of the first kind, the fulcrum is between the power and the resistance, as in fig 1, where F is the fulcrum of the lever AB; P is the power, and W the weight or resistance."—Pettigrew, 1874
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LeversSource
Pettigrew, J. Bell Animal Locomotion (New York, NY: D. Appleton & Company, 1874)
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