This early western photographer is best known for his mammoth-plate prints using 18”x22” glass plate negatives, but he actually published the majority of his work as stereoviews.

This French neo-impressionist painter was one of the originators of the technique known as pointillism or divisionism, created by scientifically juxtaposed small dots of pure color.

Answers here~ https://schristywolfe.com/2015/11/11/november-11/