More of this please. The plotter shown reminded me of the lowly harmonograph [1]. As old or older than Scientific American. [1] https://en.wikipedia.org/wiki/

More of this please. The plotter shown reminded me of the lowly harmonograph [1]. As old or older than Scientific American. [1] https://en.wikipedia.org/wiki/Harmonograph https://en.wikipedia.org/wiki/Harmonograph