Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 95
Fig. 66;—^The Angles 1—4 are equal. be acute, and 3 and 4 obtuse angles. The illusion will be intensified if the diagram be looked at with the right eye. Certain analogous illusions are daily presented to us.^ 78 LIGHT, For instance, an empty room appears smaller than whenfurnished, a papered wall… … Fig 67.—The Height o( the Hat. THE HAT EXPERIMENT. A simple amusement consists in requesting some oneto measure the height of your hat on the wall from thefloor. Generally the person addressed will indicate oneand a half times the actual height if unacquainted withthe trick. In drawing the…
Scientific recreations
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