Tables 770 and 771 609 



TABLE 770.— The Solar Constant,* Decade Means (See Tables 771 and 772) 



Decade 



1918 1919 1920 1921 1922 1923 



1-943 1.968 1.956 1.924 1.946 



L948 1.967 1-953 1-946 



1-938 1-959 1-952 



. 1.962 1.958 1.911 1.934 



I-95I 1-954 1-952 1-947 i-95i 



I-930 1-956 1-958 1.948 1923 



i-95o 1-959 1-954 1-949 1-929 



1.942 1-948 1 -940 1-939 1-936 



..... 1.931 1.932 1.932 1.931 



1-943 1-948 1.951 1-930 1-934 



1-957 1956 1.941 1-937 1-928 



1.961 1952 1-934 I-925 1-934 



1-953 I-950 1.946 1.924 1-934 



1-921 1.961 1-939 1-925 1-935 



1-945 I-950 1.941 1-937 



1-957 1-943 1-933 i-9*o 1.918 



1-938 1-934 1-936 1.913 1-934 



1-962 1.938 1-945 1-920 1.933 



I.95I 1-945 i960 1.904 1.934 



1-961 1.940 1-957 1-913 1-928 



1.921 1.950 1.951 1.953 i-9i8 1.944 



1.955 1.961 1.930 1.944 I-9I9 1-942 



1.945 I -94 2 1927 1. 916 1.940 



1-959 1-955 1-932 1.921 1.941 



1.942 1.938 1.951 1.948 



1.946 1.942 1.944 1 .931 1-947 



1.944 1-937 1-944 I-969 i-9i6 1-945 



1.951 1.947 1.942 1.959 1.926 1.942 



1.930 1.949 I-950 1.969 1-929 1-944 



1-933 i-96o 1.943 1-966 1.940 



1.928 1.958 1.951 1.953 1-929 1-935 

 1-945 I-95I I.946 1-949 1-935 1-945 



1.947 1.948 1.945 1-952 1.919 1-945 



1.962 1.944 1-957 1-956 1.912 1.942 

 1.969 1.949 1.957 1.937 1.9 1 6 1.942 

 1.960 1.958 1.956 1. 912 1. 921 



1924 1925 1926 1927 1928 



Jan. 



I 

 2 



3 

 I 



2 

 3 

 1 

 2 



3 



1 

 2 

 3 

 May 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 

 1 

 2 

 3 



Feb. 



Mar. 



Apr. 



June 



July 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



* In calories/cmVmin. at earth's mean distance from sun (Smithsonian Astrophysical Observatory). 

 Smithsonian Tables 



