0^ 



Carnegie Inst, of Wash. Pub. 289, Vol. II (Douglass) 



1, 2, 3 — Identity across 

 200 miles 



6, 7, 8 — Analyses of 

 Flagstaff pines 



4, 5 — Dearth cycles 

 near 1700 a.d. 



9, 10 — Cycles in Arizona 

 droughts 



Cyclograms 

 Explanatory diagram on opposite page 



10 



