34 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 94 



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



13579 II 13579 II 13579 13579 



Fig. 15. — The 23-year influence on periodicities of 97 and 12 

 months. Each bracketed pair covers 23 years. Full curves are from 

 original data, dotted curves from residuals after removing many 

 periodicities. 



