The "17th century Blaise Pascal calculating machines" museum display was already in Mechanical calculator, albeit a different image, so this one was redundant and not merged.
The "19th and early 20th centuries calculating machines, Musée des Arts et Métiers" image was merged.
Wikisource link was merged
Burroughs patent is just one of many—not merged. Find it in Burroughs' biography.
Discussion of Babbage's difference engine (No. 2)—better coverage at the specific article, so copied from there.
