If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "
My first intuitive reaction would be to interpret "the 1900s" as early XX century. I would not expect, say, the 80s and the 90s to be part of "the 1900s".
I wonder if that reaction can be avoided by saying something like "all the 1900s".