Diminish Shadow

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“Since A is producing light and larger than object B, the shadow of B continuously shrinks to a single point at C.” —Quackenbos 1859


sun, moon, star, light, shadow, Dark


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) 235


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