Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 63
g. 89). Nowput pieces of colored paper and other small objects on a stripof paper and draw the paper under the angle, while you lookdown between the mirrors with your eye near the angle. Doyou see a series of twelve-sided figures? ILLUSIONS The Sphinx. Thisillusion shows anEgyptian head with-out a… … behold, there is an Fig. 90. The Egyptian head GILBERT LIGHT EXPERIMENTS 61 CURTAINS
Light · Scientific recreations
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
