"The Magic Picture with Three Faces." From "Popular Scientific Recreations" by Gaston Tissandier (ca. 1890).
To produce this magic picture, three pictures (A, B, C) are cut into strips and pasted down side-by-side on a large sheet of thin paper. The strips appear in the order a1, b1, c1, a2, b2, c2, a3, b3, c3, and so on. Then the large sheet is folded accordion-fashion, so that when it is viewed head-on, picture C can be seen, when viewed from the left, picture A can be seen and when viewed from the right, picture B can be seen. This 19th century magic picture is the precursor to today’s lenticular printing process which allows pictures to change when viewed from different angles.
"The Magic Picture with Three Faces." From "Popular Scientific Recreations" by Gaston Tissandier (ca. 1890).
To produce this magic picture, three pictures (A, B, C) are cut into strips and pasted down side-by-side on a large sheet of thin paper. The strips appear in the order a1, b1, c1, a2, b2, c2, a3, b3, c3, and so on. Then the large sheet is folded accordion-fashion, so that when it is viewed head-on, picture C can be seen, when viewed from the left, picture A can be seen and when viewed from the right, picture B can be seen. This 19th century magic picture is the precursor to today’s lenticular printing process which allows pictures to change when viewed from different angles.