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



1173342. 97^1 . l\dt. BZSZ^SSZb'. 78^7. 9Si35. 4647. 4.048. 1 



124 123 122 121 120 119 118 117 116 115 114 113 112 111 



Chart 50.— Composite monthly mean net heat exchange for February. 



83 



