SUN-SPOT NUMBERS * 

 From Eidgenossische Sternwarte in Zurich, W. Brunner, Director. 



M'ns 42.1 43.5 41.3 39.5 41.2 44.6 41.9 37.4 40.6 41.5 40.6 47.0 41.7 



* Smoothed values of the sun-spot numbers will be found in the Monthly Weather Review Washington, 

 D C Vol 30 (1992), pp. 173-176, Table 2, 1749-1901. Vol. 48 (1920), p. 460, Table 2, 1901-1919. 

 Vol. 59 (1913), p. 37, 1920-1929. 



MEAN MONTHLY VALUES OF SOLAR RADIATION 



In Calories per Square Centimeter per Minute Outside the 



Earth's Atmosphere 



From Annals of the Astrophysical Observatory of the Smithsonian Institution, 



vol. V, p. 278. 



M'ns 1.940 1.939 1.939 1.939 1.941 1.939 1.940 1.939 1.940 1.939 1.939 1.938 1.939 



593 



