Slight nitpick: Newfoundland wasn't a part of Canada in 1900. Of course, if that's part of your TL, than that's OK
Nice effects on the map though
What amuses me is an old almanac/stat book/atlas made in 1930 that notes Newfoundland is separate from Canada in one line of text at the beginning of the section on Canada. Then promptly lumps it with Canada for the rest of the section in every possible way.