NO. 9 PERIODICITY IN SOLAR VARIATION ABBOT AND BOND I3 



Fig. 7.— Comparison of solar variation with terrestrial temperature departures, 

 curves A, B, C, D. Solar and terrestrial 25-month periodicities, curves E, F, G, H. 

 Solar and terrestrial 45-month periodicities, curves I, J, K, L. Temperature 

 stations: Clanton, Ala.; Washington, D. C. ; Williston, N. Dak. 



