The Data points (left) averaged to obtain time record of global mean temperature (right). S.L. Grotch after R. Lindzen (modified)
DEVIATIONS OF ANNUAL MEAN TEMPERATURE FROM LONG-TERM AVERAGE Per Year From 1851 to 1984 and GLOBALLY AVERAGED DEVIATIONS FROM AVERAGE TEMPERATURE PLOTTED
ON A SCALE RELEVANT TO THE INDIVIDUAL STATION DEVIATIONS
Per Year from 1851 to 1984. From S L Grotch after R. Lindzen. Original (published?) source not yet confirmed
Enthusiasm, Scepticism and Science 
