Five Hundred and Seven Mechanical Movements by Henry T. Brown, first published in 1896.
It's a book that has a small diagram of a strange mechanical movement, for example a set of strangely shaped gears, and a short explanation of what they do and what they were used for. There's usually about 9 per page and it's a fascinating read!
You can get an idea from the Amazon cover shot for it (which is where I got it).
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