SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 95 NUMBER 19 



CYCLES IN TREE-RING WIDTHS 



BY 

 G. G. ABBOT 



Secretary, Smithsonian Iiistituti 



0i\AH mriTur, 



DEC 16 

 2fncE u 



(PUBLICATIOK 3402) 



GITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER 16, 1936 



