THE EARTH AND THE SUN 



499 



i 



100 

 80 

 60 

 40 

 20 

 



Figure 10. 



Simple Frequency 

 Sayles. 



Figure 14. Simple Frequency. 



Sayles' curve of Fig. 10- 



Mean of Jensen's two 



curves of Fig . 11 • 



$ 

 40 

 20 







I 



x 



<d 



^"T - c * • 



2 



Figure 11. Simple Frequency - 



Jensen. 

 Earthquakes, Volcanoes. 



Figure 15- Intensity. 



Sayles' curve of Fig. 13- 

 -- Mean of Jensen's two 

 curves of Fig. 13. 



40 



20 







Figure 12. Intensity 



Fig. 16. Mean Frequency and Intensity 



Sayles. Frequency, mean of Fig. 14. 



Intensity, mean of Fig. 15. 



Figure 13. Intensity - Jensen. 

 Earthquakes, Volcanoes. 



Figure 17. Sunspots and 



Seismo-volcanic Activity. 



Seismo-volcanic curve, mean of 



Figure 16. 

 — Mean Sunspot Curve 3ince 1755, 

 inverted . 



