12 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 10/ 





-5-3-1 I 3 5 7 9 n 13 



Fig. 4. — Average effects of the 6.64s6-day period on Washington temperature 

 departures for all months of March from the year igio to 1945. From 20-day 

 tabulations. 



Fig. 5_. — Graphs derived as in table 4 and figure 4 for mean effects of the 6.6456- 

 day period on Washington temperature departures in all months of all years 

 from the year 1910 to 1945. Ordinates are degrees Fahrenheit. 



