6.AJ.4. STEREOGRAMS
New section, due to reading Glass's assertion as to the inventor, who is different than other names that I have seen.
Don Glass, ed. How Can You Tell if a Spider is Dead? and More Moments of Science. Indiana Univ Press, Bloomington, Indiana, 1996. Now you see it, now you don't, pp. 131-132. Asserts that Christopher Tyler, of the Smith-Kettlewell Eye Research Institute, San Francisco, is the inventor of stereograms.
6.AJ.5. IMPOSSIBLE CRATE.
This is like a Necker Cube where all the edges are drawn as wooden slats in an impossible configuration.
Escher. Man with Cuboid, which is essentially a detail from Belvedere, both 1958, are apparently the first examples of this impossible object.
Chuck Mathias. Letter Mad Magazine 95 (Jun 1965) 2. Gives an impossible crate.
Jerry Andrus developed his actual model in 1981 and it appeared on the cover of Omni in 1981. But Al Seckel's exhibition says the first physical example was The Feemish Crate, due to C. F. Cochran.
Seckel, 2002a, figs. 27 A&B, pp. 36-37 (= 2002b, figs. 169 A&B, pp. 186-187), shows and discusses Andrus' crate from two viewpoints.
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