Figure 22.— Temperature trace of TD at station 4995; 3 April 1953; 42°04.5' 

 N., 51 "53' W. In figures 22-35 the temperatures by reversing thermometers 

 have been superimposed and connected by a broken line. The solid lines 

 connect values of at computed from reversing thermometer temperatures. 



259 260 I «■ 3 4 5 « 7 e 9 270 I .2 3 4 5 6 .7 fl ffl 



DEGREES CENTIGRADE (5 14 13 12 II 10 9 6 7 6 5 4 3 2 1 I -i 



Figure 23.— Temperature trace of TD at station 4996; 3 April 1953; 42°01' 



N., 50°57' W. 



63 



