CRU "selected" only 1643 of the 4495 surface stations available to produce the hockey stick temperature graph below
This "selected" instrumental record was "Mike's Nature Trick" grafted onto the tree-ring proxies to "hide the decline" in the tree ring proxies to produce the infamous Mann Hockey Stick.
The Air Vent has graphed the "raw" data from all 4495 surface stations below. Lo and behold, no hockey stick.
Read more about the data at the above link. Seems to confirm the