NO. 6 



ON PERIODICITY IN SOLAR VARIATION ABBOT 



Table 2. — Correlation Solar Constant Coefficients 



Days later 



I. 

 2. 



3- 

 4- 



5. 



6. 

 7- 

 8. 



9- 

 10. 

 11. 

 12. 

 13. 

 14- 

 IS- 



16. 



I". 

 18. 



19- 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 



27. 

 28. 



29. 

 30. 

 31- 

 32. 

 33- 

 34- 

 35. 

 36. 

 37- 

 38. 

 39- 

 40. 



Years 



+ 



211 



152 

 085 

 014 

 069 

 08/ 

 O9I 



095 

 O5O 

 127 

 201 

 174 

 045 

 103 

 028 

 005 

 O08 

 119 

 08l 

 O76 

 046 

 126 

 036 



075 

 O47 



039 

 154 

 187 

 132 

 200 

 I46 

 156 

 153 

 169 

 162 

 153 

 054 

 , I 

 I48 

 037 



1909 



+ 



508 



254 

 258 



us 



002 

 080 



.194 

 153 

 184 



,223 

 033 

 06l 

 083 

 131 

 053 

 001 



162 

 181 



196 



122 



105 

 035 

 068 

 .147 

 ,084 

 O92 

 IOO 

 079 

 •15 

 030 



.157 

 119 

 ,050 

 ■258 

 ,l8l 

 035 

 .114 

 . 169 

 .Oil 

 .047 



+ 



+ 



093 +.137 



.244 

 .103 

 .102 



.367 

 .021 

 .124 

 .048 

 .083 

 .103 

 .114 

 .131 

 •033 

 .04I 

 .052 

 .178 

 .085 



.0^6 

 .258 

 .071 



• 173 

 .050 



•159 

 .027 



• 054 

 .099 

 .027 



• 033 

 .084 

 .084 



• 359 

 .056 

 .067 

 .067 

 .227 

 .123 



• 057 

 .195 

 .011 



.094 



—.045 

 .000 



+ .144 



+ .142 



+.338 

 + .134 

 + .231 

 +.073 

 —.272 

 —.035 

 + .057 

 + .057 

 +.138 

 +.175 



+ . 062 

 + .170 

 — .060 



—.051 

 +.065 

 +.362 

 + .033 



—.017 



—.051 



— .016 

 — .063 



+ .002 



— .106 



+ •13 



— .012 



— .240 



— .058 

 + .190 

 + .126 



— .079 



— .002 



+ .0 



+ .174 

 —.326 



+.05 



191; 



084 

 .458 

 038 



1915 



+ 



178 + 



031 



035 

 087 

 404 

 078 

 116 

 058 

 099 

 055 



219 



148 



030 



.176 

 176 



,058 + 

 085 + 



024 + 

 ,028 + 

 024 + 



. 184 + 



,26 9 j + 



.002! + 

 .II0| + 



■ 013' + 

 ■055; + 

 .080! + 

 .114 + 

 .080 

 .172 

 ,08l 

 .006 



— •I33|— 



— .OI4 — 



— .006 — 



— .121 — 



4-. 070 — 



+ 



+ 



,262 

 190 

 ,128 

 ,010 

 ,141 

 074 

 ,006 



+ 



+ 



229 

 170 

 129 

 122 

 249 

 145 

 116 

 247 

 339 

 173 

 097 

 069 

 .124 

 .209 

 .257 

 094 

 013J— 

 .128 + 



1916 



+ 



+ 



169 

 443 

 268 

 369 

 3*7 

 151 

 002 

 206 

 223 

 431 

 375 

 255 

 189 

 126 

 343 



.008 

 ,126 



323 

 .020 



222 



.243 

 .280 

 026 

 261 

 027 

 354 

 215 

 257 

 053 

 012 

 289 

 204 

 374 

 265 

 184 

 270 

 165 

 216 

 184 

 456 

 049 

 276 



+ .37 



1911 

 1913 



Mean 

 1909 

 1910 

 1914 



273 

 052 

 O28 

 003 

 067 

 138 

 Ol8 

 O92 

 O19 

 176 

 082 



051 

 041 

 007 

 092 

 002 

 053 



+ .228 

 + •319 

 + .133 

 + .132 

 + .133 

 + •031 

 + .135 

 + .170 

 + .115 

 + .079 

 030 



— .056 

 + •057 

 + .043 

 + .050 



— .070 



— .141 



033,— -ioo 



033— .132 



+ 



.334+ 



.225!—. 



. 190 — 



.436]— 



.0011 + 



.134!— 

 .098+ 



• 344|— 

 .097! + 

 .203 1 — 

 .189 — 

 .036 + 



107 

 139 

 040 

 060 

 075 

 063 

 022 

 044 

 071 

 010 

 067 

 122 



131 

 019 



054 

 013 

 048 

 076 

 003 



237 

 008 



—.093 



— .101 

 + .038 

 — .022 

 + .021 

 -.136 

 + .003 

 — .061 

 — .020 

 + .097 

 + .065 

 + .105 



— .032 



— .018 



— .091 



— .134 

 —.015 



052 

 119 



—.033 

 + .008 



+ . 



Mount Wilson and Bassour observations, (c) comparison of Mount 

 Wilson and Arequipa observations, (d) comparison of Mount Wilson 

 and magnetic observations, (e) comparison of Mount Wilson solar- 

 constant work with Mount Wilson solar-contrast work. The cumu- 

 lative effect of this evidence is overwhelming". 



(3) We may next note the striking result for the year 191 5. Two 

 curves of correlation are given for 191 5, of which the full line is com- 

 puted from all observations of that year, the dotted curve from those 

 prior to September 12. Both curves show strongly a periodicity of 



