The graph below shows temperatures before homogenization, including the bogus 2010 data.
The next graph shows how they made the past cooler through the magic of homogenization. The 1940s retroactively dropped a full degree!
The graph below shows the two superimposed at the same scale. Homogenized in pink.
But here is the fun part. The graph below shows the annual homogenization adjustments.
WTF? Maybe the thermometer is located on a glacier sliding into the sea.