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Was something weird happening in the 1920s or is it just an optical illusion due to the black lines?
I think you'd see similar anomalies in 1880 and 1985 stand out with similar lines.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
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