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Latest comment: 6 years ago2 comments2 people in discussion
I question the accuracy of this graph. Certainly the quality and accuracy of intruments in the 1700s, 1800s and 1900s untill around 1955 or 60 cna not be trusted because of the skill and apptitude of the measurment technitions.69.62.214.18201:32, 26 February 2007 (UTC)Ď Nor can the addition and deletion of the stations be discounted.Reply