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Sunday Morning Illusion


I’ve been helping some friends move. Ikea furniture reminded me of this gem.

If anyone can find the original source, I’d be greatful.

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  1. Good luck finding the original of that. My dad had a photostat copy of that up in his workshop well before I was born. And I’m not exactly young.

  2. Yeah, the best I could manage was that the term “Trichotometric Indicator Support” first shows up in print around 1965 in “Machine design, Volume 37” and “Road & Track, Volume 17”. Chances are the drawing existed before that, though.

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