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#camera obscura – @magictransistor on Tumblr
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Magic Transistor

@magictransistor / magictransistor.tumblr.com

Teledioptricus Obscurae
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Adolphe Ganot. Ghost Scenes, Formation of Images in Plane Mirrors, Images of the Camera Obscura, Virtual Image, Decompisition of Light by Prisms, Positives on Glass, Different Kinds of Lenses, Conjugate Focus, Visual Effects of Refraction, Electrical Discharge in Highly Rarefied Gases (Frontispiece). Natural Philosophy for General Readers and Young Persons. 1876.

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Seven engraved illustrations describing the science behind a variety of Optical and Image-making Machines, including a portable Camera Obscura, a Binocular Telescope, and various Magic Lanterns; a Simple Tin Instrument, with a small flame which casts light and an adjustable tube to change the size of the projections; Plate 57 / 'Book III of A Compleat System of Opticks.' [William Hooper]; "Rational Recreations: In which the Principles of Numbers and Natural Philosophy are Clearly and Copiously Elucidated, by a Series of Easy, Entertaining, Interesting Experiments." (London-England), 1774.

Source: rc.umd.edu
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“Plate III” features four illustrations of rational recreations involving optics and illusions. Figure 1 illustrates the refraction of light through water in a vessel. Figure 2 diagrams alterations in human vision based on the optic nerve receptors. Figure 3 is a portable camera obscura much like the one illustrated by Guyot in Nouvelles récréations. Figure 4 is a Magic Lantern. William Hooper's original edition of Rational Recreations, Volume II (Engraved by John Lodge), 1782.

Source: rc.umd.edu
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