102 ANNUAL REPORT SMITHSONIAN INSTITUTION, 193 5 



12 MO. BERLIN 12 MO. COPENHAGEN 9| MO. BERLIN 9| MO. COPENHAGEN 



1357 9 II 13579 II 13 579 13579 



Figure 6. — The 23-year influence on periodicities of 9% and 12 months. Each bracketed 

 pair covers 23 years. Full curves are from original data, dotted curves from 

 residuals after removing many periodicities. 



