144 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1944 
only in general, but in many details, there is much similarity. We 
await with very great interest the crucial test to come in the latter 
part of 1944 and 1945. If the prophecy is then verified, we may 
expect, as I pointed out occurred about 1922-23,3 unusual weather 
conditions in 1945-46. 
EFFECT OF LONGER SOLAR VARIATIONS ON WHATHER 
Among the shorter periods found in solar variation, as indicated 
by Smithsonian solar-constant measures, are periods of approxi- 
mately 8, 984, and 1114 months. I have sought to determine how 
these and the longer periods of solar variation affect temperature 
and precipitation in many cities. To fix ideas I give a tabulation 
(tables 3 and 4) for 8, 934, and 1114 months at Copenhagen to show 
how these influences are examined.* 
TABLE 3.—Copenhagen temperature departures, smoothed. Test of 8-month period 
[Values of January to August only. Unit: 1/10 degree C.; for means, 1/100 degree C.] 
Year Jan Feb Mar Apr May June July Aug 
1800____ _--.----]| —19 | —17 | —47 33 29 | —12/} — 4 15 
BOQ St a. Vac ee een) || a It 22 10 | —15 | —17 | —33 6 
DEOL I26 oes eee 18 |} —21 | —25 | — 8 11 3 5 11 
WSOG 2225 tk See ake hve 19 | — 4] —19 8 | —20} —15 9 
SOSA NE OM ap ee 8 | —11} —19 | —17 9 9 24 26 
115) I JEP sak Ry SURE wv ng es 1}—5]— 2] —16 | —27)| — 4 8 6 
i [fa] I ja een ge AE at pe | 138 | —18 | —382 | —14 | — 4] —21 2 
18142205222. 28 S2 538 — 53 je = 29 4 {| —30 | —15 10 — 2 
PG ape tat 7857. alee ey, 4| —22/} —4]|-— 6] —27| —15 2 —14 
PSB ee 2 EA anaes 14 185 20 | —21 |} — 3 11 14 — 2 
LSZ0 esse eee eee ees 1|— 4 12 0; —15}] — 7 — 3 
Mean________._| —53 | —64 |—100 | —39 | —54 | —72 | —15 +49 
1300 t6/1820- 2.2: —53 | —64 |—100 | —39 | —54 | —72 | —15 +49 
4822 to 1842... § 2 - =—71 }— 6 105 42 8 fo-| = 4 18 
1844 to 1864_______- — iG 4 e=1E [Sod b= Oia th 82 — 30 
HSG6 to Isson2 soe 2 127 115 44 85 | —27 4 35 24 
1888 to 1908202 fe 123 59 25 he 17 oy) =25 — 64 
L9LO't0. 198022 2. ees 74 108 133 96 58 | —59 46 16 
The maximum appears to shift 11 months and the minimum 19 months to the right in 110 years. With 
such large shifts one cannot exactly determine the proper correction to the period with one trial. These 
3 19X8 1 
shifts however indicate: By the maximum, we month; by the minimum, = -— month. 
110X129 
Further trials led us to fix on the correction 44 month, and to prefer the period 844 months. 
3 Proc. Nat. Acad. Sci., vol. 9, No. 6, June 1923. 
4In this publication I give only the tabulation for the 8-month period, and its 
correction to 8% months for Copenhagen. Others were shown at the lecture. 
