Inertia Demonstration
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“... balance a card with a penny placed upon it on the tip of one of the fingers of the left hand, and strike it suddenly with the middle finger of the right hand, as represented [here].” —Quackenbos 1859
Source
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) 16
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