. Smithsonian miscellaneous collections. itseems clear, as shown at the right in the illustration, that the positionof maximum of the periodicity in Bismarck temperaturedepartures shifts through the year. Figure 20 shows other studiesof the same kind on several of the shorter periods. They were madefor various stations, and during a quite other range of years thanfigure 19. It will be noted that the result for the periodin Bismarck temperature departures is nearly the same in the twofigures, though representing intervals of time nearly a half centuryapart. Another and b
. Smithsonian miscellaneous collections. itseems clear, as shown at the right in the illustration, that the positionof maximum of the periodicity in Bismarck temperaturedepartures shifts through the year. Figure 20 shows other studiesof the same kind on several of the shorter periods. They were madefor various stations, and during a quite other range of years thanfigure 19. It will be noted that the result for the periodin Bismarck temperature departures is nearly the same in the twofigures, though representing intervals of time nearly a half centuryapart. Another and better method of determining seasonal phasechanges is used for test predictions to be referred to and will be ex-plained below. 9 (B). PERIODIC WEATHER RESPONSES CORRECT LENGTHS OFSOLAR PERIODICITIES With the aid of Miss McCandlish, I have investigated terrestrialresponses to the solar periods rather extensively. A sample of theseinvestigations is given in my paper An Important Weather Element no. 5 WEATHER AND SOLAR VARIATION—ABBOT 29. rt^; r-1 >> 3 C/3 J3 » C O E Oi rt N h M ?/] pq Ch 3Q SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 104 A 1 N N N s N NNu N s NNN s • 0 - c 11 • / 1 7 1 * 0 j f 0 * y< < ^ j < / ° | i£ O tf 1 i y^ < ll 0 I • 1 < 0 0 /% N If • 1 —o-3 1 0 ^ N • X 1 0 N • ^^ < 0 » / O) K If) *) to OO/itJdJO SHLNOH NO. 5 WEATHER AND SOLAR VARIATION—ABBOT 31 Hitherto Generally Disregarded, 8 pages 14 to 23. I repeat here, asfigure 21, figure 7 of that paper, which shows that when the best lengthof period is found, and seasonal influences on phase are eliminatedthe 8-g-month periodicity has continued with considerable amplitudesand stable phases in the temperatures of Copenhagen, Vienna, andNew Haven, from the year 1700 till now. This shows that the sunsvariation, which has been observed regularly only since 1918, hasmaintained the 8^-month periodicity in unchanged phases for at least140 years. Other evidences of
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