137 136 135 13d 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 



3 1 . 3638. 9 132. 9935. 7437. 0539^33<5O\42. 2345. 4845. 48 22 

 28. 2B 32.57 29^2831. 4241/79 2578036.5342. 5441. 9535. 6621 



137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 



Chart 13.— Composite monthly mean effective back radiation for January. 



46 



