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Optical illusion: Light and Dark Bricks

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Light and Dark Bricks. In this striking illusion the brown and yellow bricks appear to be wedge-shaped, and the rows of bricks seem to converge to one another, but if a ruler is laid along any of the lines it will at once be seen that they are all quite straight and perfectly parallel. Illustration for one of a set of cigarette cards on the subject of Optical Illusions, published by Ogden's, early 20th century.

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