i6 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 85 



Table 5. — Periodic Analysis of Washington Temperature Departures 



Periodicities 

 Degrees x 10 Fahr. 



68 m 



1918 Jan I 



Feb o 



Mar. —I 



April — 2 



May —3 



June — 4 



July —5 



Aug —6 



Sept —7 



Oct -8 



Nov —9 



Dec —10 



1919 Jan — : i 



Feb —12 



Mar —13 



April —14 



May —14 



June —IS 



July —IS 



Aug — 16 



Sept —15 



Oct —15 



Nov —IS 



Dec —14 



1920 Jan — 14 



Feb -13 



Mar — 13 



April —13 



May — 12 



June —12 



July —II 



Aug — 10 



Sept — 9 



Oct —8 



Nov —7 



Dec —6 



1921 Jan — 4 



Feb —3 



Mar —I 



April o 



May 2 



June 4 



July 6 



Aug 7 



Sept 8 



Oct 9 



Nov 10 



Dec II 



1922 Jan 12 



Feb 12 



Mar 12 



April 13 



May 13 



June 13 



July 12 



Aug 12 



Sept 12 



Oct II 



Nov II 



Dec 10 



1923 Jan 9 



Feb 8 



Mar 7 



April 6 



May S 



June 4 



July 3 



Aug 2 



Sept I 



Oct o 



Nov — I 



Dec —2 



