CORRELATION WITH SUNSPOTS. 



75 



s.o 



Measured rings 



t\ 



Stanc/artf/zee/emd 'smoothed \ 



30 40 1850 60 70 80 90 1900 10 



FIG. 22. Sunspot numbers and annual rings in spruce tree from south Sweden. 



\aso. 1900 



Ebersvralcfe, 

 Prussia. 



South 

 Sweden 



Sun Spot; 



ieso 1900 



FIG. 23. Six European groups, standardized and smoothed. 



