34 



CLIMATIC CYCLES AND TREE GROWTH 



Chrono-Integration— The successive integration above described deals 

 with successively increasing cycle values as tested in the same data. Chrono- 



18 YEAR PERIOD 



|«— iSyears— »| 



5years 



)*— I8years— *\ 

 19 YEAR PERIOD 



I9years- 



|«- 20 years —J 



21 YEAR PERIOD 



k~ 21 years 



iniU- 



Syears \*—2Zyears 

 Fig. 16 — Successive integration of FAM (Flagstaff area mean curve), 1700-1920. 



integration means a series of tests of the same cycle lengths applied in definite 

 successive intervals of time. This process was used in connection with the 

 first attempts at cycle analysis of our long chronologies (Chapter VI, page 121), 



