"Evert Wesker" schreef in bericht
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Ladies, Gentlemen
The January data from Holland. Up to 1899 it is the so called
"Labrijn reeks", after that the data from De Bilt. The range is not
homogeneous. However, it gives you a nice idea.

snip Thank you, Evert. It would be nice to compare all the given data.
There must be some similarities. Nice job for X-mas days. Maybe I'll go for
it in a lost hour :-).


Wijke