Animated gif file found on a  US  ftp site
If you eyeball particular areas of the map, eg the old USSR  and Alaska / Canada mainly before WWII,  as  frames flick past you will see cases of  standout spurious outlier grid point values.  A real ripper in E Mongolia can be off the scale up into the 1960's.  Will post some of these later.  If you download this +6MB file, it will work faster on your PC.
Movie GHCN 1880

Posted 12, September, 2001

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