THE ASTROPHYSICAL OBSERVATORY—ABBOT 173 
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FIGURE 3.—Effect of solar variation of the 648d pei iod on Washington temperatures, 
Il m 
MG Ct Pes eee 
Mara Teer 
| SE ea eee eS SG 
Pee a Vy 
Bia aaa 
: iS 
(OV 
ae ag aay’ prediction of Washington temperatures based on the 6.6456-day period 
(dotted line), and the actual event (solid line). 
