human activity linked to hottest summers..., page-3

  1. 12,465 Posts.
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    interesting questions, how did they do it?

    the 'instrumental record' goes back to around 1850, this was a world wide standard for temp measurement so im guessing they could in do it 1910

    you can have a large scale with a normal mercury thermometer with a big bulb and a thin tube so reading .1 wouldn't be much of a problem.

    sounds like they really got their act together in the 1800's and with various mechanical and electrical measuring devices you wouldn't have to check it every 5 mins

    http://www.capgo.com/Resources/InterestStories/TempHistory/TempHistory.html

 
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